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Clinical Dermatology E-Book

Clinical Dermatology E-Book

Thomas P. Habif

(2015)

Additional Information

Book Details

Abstract

Identify, treat, and manage the full range of skin diseases with guidance from Clinical Dermatology: A Color Guide to Diagnosis and Therapy the world’s leading dermatology manual. Clean formatting, easy indexing, and exceptional color images make this an indispensable source for definitive, state-of-the-art answers on every aspect of dermatologic care.

  • Presents outstanding photographs for virtually every common skin disorder.

  • Organizes disease information with a Disorders Index on the inside front cover, allowing for quick access to specific guidance, and a brand new Regional Diagnosis Atlas in chapter 1.

  • Uses a consistent format in every chapter to present information in a logical, easy-reference fashion.
  • Make rapid, confident decisions on diagnosis and treatment by comparing your clinical findings to over 1,000 of the highest quality color images—including hundreds of original, never-before-published photographs—depicting virtually any skin condition.
  • Apply the newest developments in diagnosis and treatment thanks to thorough updates throughout including an extensive section on the management of acne, eczema, and psoriasis as well as expanded coverage of arthropod disease.
  • Prescribe effective dermatologic treatment with an expanded formulary to the most commonly used drugs; detailed guidance on the use of antibiotics; and the inclusion of the latest drug treatment options.
  • Quickly access vital, up-to-date information from new tables throughout summarizing "need to know" diagnostic and therapeutic evidence.

Table of Contents

Section Title Page Action Price
Front cover Cover
Disorders index es
Quick reference formulary ii
Front matter ix
Clinical dermatology ix
Copyright x
Preface xi
Rapid access to the text xi
Electronic version xi
PMID numbers (PubMed identification numbers) xi
How to use this book xi
Students in the classroom xi
Students in the clinic xi
The non-dermatologist provider xi
The dermatologist xi
Production xii
Contents xiii
Skin anatomy xvi
1 Principles of diagnosis and anatomy 1
Skin anatomy 1
Epidermis 1
Dermis 1
Dermal nerves and vasculature 1
Diagnosis of skin disease 2
A methodical approach 2
Examination technique 2
Approach to treatment 2
Primary lesions 2
Secondary lesions 2
Primary skin lesions—macules 3
Macule 3
Hypopigmented 3
Brown 3
Blue 3
Red 3
Primary skin lesions—papules 4
Papule 4
Flesh colored, yellow, or white 4
Brown 4
Red 4
Blue or violaceous 4
Primary skin lesions—plaques 6
Plaque 6
Primary skin lesions—nodules 8
Nodule 8
Primary skin lesions—pustules 9
Pustule 9
Primary skin lesions—vesicles and bullae 10
Vesicle 10
Bulla 10
Primary skin lesions—wheals (hives) 11
Wheal (hive) 11
Secondary skin lesions—scales 12
Scales 12
Fine to stratified 12
Scaling in sheets (desquamation) 12
Secondary skin lesions—crusts 13
Crust 13
Secondary skin lesions—erosions and ulcers 14
Erosion 14
Ulcer 14
Secondary skin lesions—fissures and atrophy 15
Fissure 15
Atrophy 15
Secondary skin lesions—scars 16
Scar 16
Special skin lesions 17
Excoriation 17
Comedone 17
Milia 17
Cyst 17
Petechia 18
Purpura 18
Burrow 18
Lichenification 18
Telangiectasia 18
Regional differential diagnosis atlas 19
Anus 20
Areola (breast) 21
Arms and forearms 22
Axillae 24
Back 26
Beard 28
Buttocks 29
Ear 30
Elbows and knees 31
Face 32
Finger 35
Foot (dorsa and sides) 36
Foot (sole) 38
Groin 40
Hands (dorsa) 41
Hands (palms) 44
Inframammary 46
Legs 47
Legs (lower) 47
Lips 51
Neck 52
Neck (back) 52
Nose 54
Oral cavity 55
Penis 56
Scrotum 56
Perioral 60
Periorbital 62
Scalp 63
Thigh (inner surface and inguinal groove) 65
Trunk 66
Chest 66
Vulva 72
Wrist 74
2 Topical therapy and topical corticosteroids 75
Topical therapy 75
Emollient creams and lotions 75
Severe dry skin (xerosis) 75
Wet dressings 76
Topical corticosteroids 77
Strength 77
Megapotent topical steroids (group I) 78
Concentration. 78
Compounding. 78
Generic versus brand names. 78
Vehicle 78
Steroid-antibiotic mixtures 79
Amount of cream to dispense 79
Application 79
Frequency 79
Tachyphylaxis. 79
Intermittent dosing 80
Group I topical steroids. 80
Groups II through VII topical steroids. 80
Methods 80
Simple application. 80
Occlusion. 80
Method of occlusion. 81
Systemic absorption 81
Avoid weaker, “safe” preparations. 82
Children. 82
Adults. 82
Adverse reactions 82
Steroid rosacea and perioral dermatitis (figures 2-7 to 2-11) 82
Management. 82
Atrophy 84
Occlusion. 86
Mucosal areas. 86
Steroid injection sites. 87
Long-term use. 87
Alteration of infection 87
Tinea incognito. 87
Infestations and bacterial infections. 87
Contact dermatitis 89
Topical steroid allergy 89
Management. 89
Patch testing. 89
Glaucoma 89
3 Eczema and hand dermatitis 90
Stages of eczematous inflammation 90
Acute eczematous inflammation 90
Subacute eczematous inflammation 93
Adult-onset recalcitrant eczema and malignancy 96
Chronic eczematous inflammation 97
Hand eczema 99
Irritant contact dermatitis 103
Atopic hand dermatitis 103
Allergic contact dermatitis 104
Nummular eczema 104
Recurrent focal palmar peeling 104
Hyperkeratotic eczema 105
Fingertip eczema 106
Pompholyx 109
Id reaction 109
Eczema: Various presentations 110
Asteatotic eczema 110
Nummular eczema 111
Chapped fissured feet 113
Self-inflicted dermatoses 114
Lichen simplex chronicus 114
Prurigo nodularis 117
Neurotic excoriations 118
Psychogenic parasitosis 119
Stasis dermatitis and venous ulceration: Postphlebitic syndromes 120
Stasis dermatitis 120
Types of eczematous inflammation 120
Subacute inflammation 120
Acute inflammation 120
Chronic inflammation 121
Treatment of stasis dermatitis 121
Topical steroids and wet dressings. 121
Venous leg ulcers 122
Management of venous ulcers 125
Initial evaluation and treatment. 125
Treatment. 125
Inflammation surrounding the ulcer. 125
Compression. 125
4 Contact dermatitis and patch testing 126
Severe occupational contact dermatitis 127
Irritant contact dermatitis 128
Allergic contact dermatitis 129
Phases 129
Sensitization phase 129
Elicitation phase 129
Cross-sensitization 129
Systemically induced allergic contact dermatitis 129
Clinical presentation 131
Allergic contact dermatitis in children 133
Rhus dermatitis 133
Natural rubber latex allergy 135
Types of reactions 135
Irritant contact dermatitis. 135
Allergic contact dermatitis (type IV allergy). 135
5 Atopic dermatitis 150
Pathogenesis and immunology 152
Clinical aspects 152
Infant phase (birth to 2 years) 154
Childhood phase (2 to 12 years) 157
Adult phase (12 years to adult) 161
Associated features 162
Dry skin and xerosis 162
Ichthyosis vulgaris 162
Keratosis pilaris 163
Hyperlinear palmar creases 165
Pityriasis alba 165
Atopic pleats 165
Ocular complications 165
Triggering factors 167
Temperature change and sweating 167
Decreased humidity 167
Excessive washing 167
Contact with irritating substances 167
Contact allergy 167
Aeroallergens 167
Microbic agents 167
Staphylococcus aureus 167
Food 167
Emotional stress 168
Prevention of atopic dermatitis 169
Treatment of atopic dermatitis 169
Dry skin 169
Inflammation and infection 169
Pimecrolimus cream 1% (elidel) 171
6 Urticaria, angioedema, and pruritus 178
Clinical aspects 178
Pathophysiology 182
Initial evaluation of all patients with urticaria 182
Acute urticaria 183
Chronic urticaria 186
Differential diagnosis 187
Treatment of urticaria 189
Approach to treatment 189
First-line therapy 189
Antihistamines. 189
Mechanism of action. 189
Initiation of treatment. 189
Side effects. 189
Long-term administration. 189
H1 and H2 antihistamines. 189
First-generation (sedating) H1 antihistamines. 189
Second-generation (low-sedating) H1 antihistamines. 189
Fexofenadine (allegra). 189
Cetirizine (zyrtec). 189
Loratadine (claritin). 190
Desloratadine (clarinex). 190
Tricyclic antihistamines (doxepin). 190
Epinephrine. 190
Second-line agents 190
Oral corticosteroids. 190
Leukotriene modifiers. 190
Dapsone. 190
Cyclosporine. 190
Mycophenolate mofetil. 190
Third-line agents 190
Intravenous immunoglobulin. 190
Methotrexate. 190
Topical measures. 191
Omalizumab. 191
Physical urticarias 191
Dermographism 191
Pressure urticaria 192
Cholinergic urticaria 193
Exercise-induced anaphylaxis 194
Cold urticaria 194
Heat, water, and vibration urticarias 195
Solar urticaria 195
Pathogenesis 195
Treatment. 195
Aquagenic pruritus 195
Angioedema 196
Acquired forms of angioedema 196
Acquired angioedema (C1 INH deficiency syndromes) 200
Hereditary angioedema 200
Contact urticaria syndrome 202
Dermatoses of pregnancy 203
Urticarial vasculitis 206
Serum sickness 207
Mastocytosis 208
Spectrum of disease 208
Cutaneous mastocytosis 209
Solitary mastocytoma. 209
Urticaria pigmentosa. 209
Telangiectasia macularis eruptiva perstans (TMEP). 211
Diffuse cutaneous types. 211
Systemic mastocytosis 213
Diagnosis. 213
Diagnostic criteria for systemic mastocytosis. 213
Diagnosis 213
Skin disease. 213
Urine N-methylhistamine. 213
KIT Asp816Val mutation analysis, blood or bone marrow. 214
Serum tryptase level. 214
Bone marrow histology. 214
Mast cell immunophenotyping. 214
Prognosis. 214
Management 214
Cutaneous disease. 214
Systemic disease treatment. 214
Chronic pruritus 215
7 Acne, rosacea, and related disorders 218
Acne 218
Classification 220
Etiology and pathogenesis 225
Approach to acne therapy 226
Initial visit 226
History. 226
Pathogenesis and course. 226
Diet and family history. 226
Cosmetics and cleansers. 226
Oral contraceptives. 226
Initial evaluation 226
Type of lesions. 226
Degree of skin sensitivity. 226
Selection of therapy. 226
Course of treatment. 227
Acne treatment 227
Comedonal acne 227
Clinical presentation. 227
Treatment. 227
Mild inflammatory acne 228
Clinical presentation. 228
Treatment. 228
Moderate-to-severe inflammatory acne 229
Clinical presentation. 229
Treatment. 229
Severe: Nodulocystic acne 231
Clinical presentation. 231
Cystic acne 231
Pyoderma faciale. 231
Acne fulminans 231
Acne conglobata 233
Treatment of nodulocystic acne 233
Therapeutic agents for treatment of acne 235
Retinoids 235
Tretinoin. 235
Tazarotene. 236
Adapalene. 236
Azelaic acid. 236
Benzoyl peroxide 236
Benzoyl peroxide/antibiotic formulations. 236
Principles of treatment. 236
Allergic reaction. 236
Drying and peeling agents 236
Topical antibiotics 237
Oral antibiotics 237
Mechanism of action and dosage. 237
Antibiotic-resistant propionibacteria and long-term therapy. 237
Long-term treatment. 237
Dosage and duration. 237
Tetracycline antibiotics. 237
Tetracycline. 237
Dosing. 237
Adverse effects. 237
Doxycycline. 238
8 Psoriasis and other papulosquamous diseases 263
Psoriasis 263
Pathogenesis 264
Clinical manifestations 264
Drugs that precipitate or exacerbate psoriasis 265
Lithium. 265
Beta-blocking agents. 265
Antimalarial agents. 265
Systemic steroids. 265
Comorbidities associated with psoriasis 265
Clinical presentations 265
Chronic plaque psoriasis 265
Guttate psoriasis 265
Generalized pustular psoriasis 268
Erythrodermic psoriasis 268
Light-sensitive psoriasis 269
Psoriasis of the scalp 269
Psoriasis of the palms and soles 269
Pustular psoriasis of the palms and soles 270
Keratoderma blennorrhagicum (Reiter syndrome) 271
Psoriasis of the penis and Reiter syndrome 272
Pustular psoriasis of the digits 272
Human immunodeficiency virus (HIV)–induced psoriasis 272
Psoriasis inversus (psoriasis of the flexural or intertriginous areas) 273
Psoriasis of the nails 274
Psoriatic arthritis 275
Defining psoriatic arthritis (PsA) 275
Differentiating PsA and rheumatoid arthritis (RA) 276
Differentiating PsA from osteoarthritis (OA) and gout 278
Treatment of psoriasis 279
Topical therapy 282
Topical steroids 282
Intralesional steroids 283
Topical calcineurin inhibitors 283
Vitamin D analogues (calcipotriene, calcitriol) 283
Tazarotene 283
Coal tar 284
Nonmedicated topical moisturizers 284
Ultraviolet light therapy 284
Photochemotherapy 284
Tape or occlusive dressings 284
Treating the scalp 284
Removing scale. 284
Mild-to-moderate scalp involvement. 285
Treatment of diffuse and thick scalp psoriasis. 285
Tar and oil. 285
Etanercept. 285
Treatment of inverse/intertriginous psoriasis and genital psoriasis 285
Systemic therapy 285
Rotational therapy 285
Combination therapy of systemic and biologic agents 285
Treatment of pregnant or lactating women. 287
Methotrexate 287
Indications and use. 287
Mechanism of action. 289
Dosing. 289
Monitoring. 289
Side effects. 289
Folate supplementation. 289
Hepatotoxicity 289
Lung toxicity. 289
Recall of sunburn. 289
Pregnancy. 290
Drug interactions. 290
Retinoids 290
Acitretin. 290
Indications. 290
Dosing strategy. 290
Acitretin and ultraviolet light B and PUVA. 290
Laboratory changes. 290
Side effects. 291
Isotretinoin 291
Cyclosporine 293
Baseline monitoring. 293
Managing nephrotoxicity. 293
Managing hypertension. 293
Liver function. 293
Other chemistries. 294
Other side effects. 294
Dosage. 294
Low-dose approach. 294
High-dose approach. 295
Intermittent short courses. 295
Weekend therapy. 295
Response to treatment. 295
Contraindications. 295
Drug interactions. 295
Combination therapy. 295
Rotational therapy 295
Other systemic drugs for psoriasis 295
Biologic therapy for psoriasis 295
Vaccines 295
TNF-α inhibitors for the treatment of psoriasis 296
Adalimumab. 296
Etanercept. 297
Pediatric psoriasis. 297
Infliximab 298
Biologics that target cytokines interleukin-12 and interleukin-23 298
Ustekinumab. 298
Phosphodiesterase 4 inhibitor. 298
Pityriasis rubra pilaris 299
Seborrheic dermatitis 302
Infants (cradle cap) 302
Young children (tinea amiantacea and blepharitis) 303
Adolescents and adults (classic seborrheic dermatitis) 304
Acquired immunodeficiency syndrome 304
Treatment of seborrheic dermatitis 304
Shampoos. 304
Topical antifungal agents. 304
Topical steroids. 305
Calcineurin inhibitors. 305
Oral antifungals. 305
Other topicals. 306
Scalp scale. 306
Oral treatments. 306
Pityriasis rosea 307
Lichen planus 310
Localized papules 312
Generalized lichen planus and lichenoid drug eruptions 312
Hypertrophic lichen planus 312
Lichen planus of the palms and soles 312
Follicular lichen planus 314
Oral mucous membrane lichen planus 314
Erosive vaginal lichen planus 316
Nails 316
Diagnosis 316
Treatment 316
Therapy for cutaneous lichen planus 316
Therapy of mucous membrane lichen planus 318
Lichen sclerosus 321
Pityriasis lichenoides 326
Grover’s disease 328
9 Bacterial infections 329
Skin infections 329
Impetigo 329
Bullous impetigo 330
Clinical manifestations. 330
Nonbullous impetigo 332
Laboratory findings. 332
Prevention of impetigo 332
Recurrent impetigo 332
Treatment of impetigo 332
Oral antibiotics. 336
Mupirocin (bactroban). 336
Retapamulin (altabax). 336
Cellulitis and erysipelas 336
Diagnosis of cellulitis 336
Cellulitis versus deep vein thrombosis. 336
Cultures. 337
Treatment of cellulitis 337
Preventing recurrent cellulitis 340
Prophylactic antibiotics to prevent recurrence. 340
Children. 340
Cellulitis of specific areas 340
Cellulitis and erysipelas of the extremities 340
Treatment. 340
Facial erysipelas and cellulitis in adults 341
Erysipelas. 341
Recurrence. 342
Treatment. 342
Perianal cellulitis 342
Necrotizing skin and soft tissue infections 342
Necrotizing fasciitis 342
Clinical manifestations 343
Bacteria 343
Monomicrobial form. 343
Polymicrobial form. 343
Diagnosis. 343
Treatment 343
Gas gangrene 344
Folliculitis 345
Staphylococcal folliculitis 345
Pseudofolliculitis barbae (razor bumps) 346
Prevention and treatment 346
Shaving techniques. 346
Laser. 347
Keratosis pilaris with folliculitis 347
Sycosis barbae 348
Acne keloidalis 349
Treatment 349
Furuncles and carbuncles 350
Location 350
Bacteria 350
Predisposing conditions 350
Clinical manifestations 350
Differential diagnosis 351
Treatment of furuncles 352
Incision, drainage, and packing. 352
Culture and gram stain. 352
Antibiotics. 352
Recurrent furunculosis 352
Management 352
Erysipeloid 353
Blistering distal dactylitis 355
Staphylococcal scalded skin syndrome 355
Epidermolytic toxin 355
Incidence 355
Clinical manifestations 356
Pathophysiology 356
Diagnosis 356
Treatment 356
Pseudomonas aeruginosa infection 358
Pseudomonas folliculitis 358
Clinical manifestations 358
Pathophysiology 358
Management 358
Pseudomonas cellulitis 360
Treatment 360
External otitis 360
Eczematous external otitis 361
Treatment. 361
Cleansing and debridement. 361
Topical therapy 361
Topical steroids. 361
Topical antibiotics. 362
Tacrolimus. 362
Acidification. 362
Wicks. 362
Systemic antimicrobial therapy. 362
Prevention 362
Treating eczema 362
Malignant external otitis 362
Imaging studies 363
Management 363
Toe web infection 364
Treatment 364
Ecthyma gangrenosum 364
Clinical presentation 364
Management (septicemic form) 365
Meningococcemia 365
Transmission 365
Incidence 365
Pathophysiology 366
Clinical manifestations 366
Fulminant disease and purpura fulminans 368
Diagnosis 368
Differential diagnosis 368
Treatment 372
Antibiotics. 372
Management of shock. 373
Vaccines 373
Chemoprophylaxis 373
Nontuberculous mycobacteria 374
M. marinum 375
M. ulcerans, M. fortuitum, M. chelonae, and M. avium-intracellulare 375
Laboratory diagnosis 375
Treatment 375
10 Sexually transmitted bacterial infections 377
Sexually transmitted disease presentations 377
Genital ulcers 377
Developed countries 377
Syndromic management of sexually transmitted diseases 381
Syphilis 390
Incidence 390
Stages 390
Risk of transmission 390
Treponema pallidum 392
Primary syphilis 392
Secondary syphilis 394
Lesions 394
Latent syphilis 396
Tertiary syphilis 396
Syphilis and human immunodeficiency virus 396
Congenital syphilis 396
Early congenital syphilis 397
Late congenital syphilis 397
Syphilis serology 398
Conventional testing 398
Initial screening by syphilis IgG assay 399
Syphilis antibody response 399
Reverse algorithm screening 399
Venereal disease research laboratory and rapid plasma reagin tests 401
Quantitative testing. 401
False-positive reactions. 401
Prozone phenomenon. 401
Fluorescent treponemal antibody absorption and T. pallidum particle agglutination tests 401
Tests for neurosyphilis 402
Patients with human immunodeficiency virus 402
Treatment of syphilis 402
Jarisch-Herxheimer reaction 403
Management of the patient with a history of penicillin allergy 403
Posttreatment evaluation of syphilis 403
Serologic response to treatment 403
Late latent syphilis 403
Frequency of follow-up serologic tests 403
Reinfection in primary, secondary, and latent syphilis 403
Rare sexually transmitted diseases 404
Lymphogranuloma venereum 404
Primary lesions 404
Inguinal stage 404
Genitoanorectal syndrome 405
Diagnosis 405
Management 405
Lesion management. 405
Chancroid 406
Bacteria 406
Primary state 406
Lymphadenopathy 406
Diagnosis 406
Treatment 407
Donovanosis (granuloma inguinale) 408
Clinical presentation 408
Diagnosis 408
Treatment 408
Diseases characterized by urethritis and cervicitis 409
Urethritis 409
Etiology 410
Confirmed urethritis 410
Nongonococcal urethritis 410
Diagnosis 410
Treatment 410
Follow-up 410
Recurrent and persistent urethritis 411
Cervicitis 411
Etiology 411
Diagnosis 411
Treatment 411
Gonorrhea 411
Neisseria gonorrhoeae 412
Diagnostic considerations 412
Genital infection in males 413
11 Sexually transmitted viral infections 418
Genital warts 418
Virus types 418
Incidence 418
Regression and persistence 418
Risk 419
Transmission 419
Clinical presentation 419
Oral condyloma in patients with genital human papillomavirus infection 422
Pearly penile papules 422
Genital warts in children 422
Diagnosis 422
Treatment 423
Management of sexual partners 423
Pregnancy 423
Children 424
Patient-applied therapies 424
Imiquimod. 424
Podofilox. 424
Green tea sinecatechins (veregen ointment). 424
Provider-administered therapies 424
Cryosurgery. 424
Surgical removal and electrosurgery. 424
Trichloroacetic acid. 425
Podophyllum resin. 425
Warning. 425
Alteration of histopathology. 425
5-Fluorouracil cream. 425
Carbon dioxide laser. 425
Bowenoid papulosis 426
Molluscum contagiosum 426
Clinical manifestations 426
Diagnosis 428
Treatment 428
Over-the-counter treatments 428
Curettage 428
Cryosurgery 428
Antiviral and immunomodulatory therapies 428
Cantharidin 428
Potassium hydroxide 428
Oral cimetidine 428
Laser therapy 428
Trichloroacetic acid peel 428
Genital herpes simplex 429
Prevalence 429
Risk factors 429
Rate of transmission 429
Previous herpes simplex virus type 1 infection 431
Human immunodeficiency virus infection 431
Primary and recurrent infections 431
First-episode infections 431
Signs and symptoms. 431
Recurrent infection 431
Clinical signs and symptoms. 431
Frequency of recurrence. 436
Anatomic site. 436
Asymptomatic transmission. 436
Asymptomatic shedding. 436
Prevention 436
Laboratory diagnosis 437
Polymerase chain reaction 437
Culture 437
Histopathologic studies 437
Serology 437
Subtyping 437
Herpes simplex virus type 1. 437
Type-specific serologic tests 437
Indications to test 438
Pregnant women. 438
Monogamous couples. 438
Diagnosis of recurrent genital eruptions. 438
Identifying herpes simplex virus as a risk factor for human immunodeficiency virus transmission. 438
Psychosocial implications 438
Treatment of genital herpes (CDC guidelines) 438
Drugs 438
First clinical episode of genital herpes 440
Cool compresses 440
Counseling 440
Recurrent episodes of herpes simplex virus disease 440
Daily suppressive therapy 440
Lubrication 440
Genital herpes simplex during pregnancy 441
Pregnancy complications 441
Prenatal screening and management 441
Prevention 441
Antiviral therapy 441
Viral cultures 441
Management at labor 441
Neonatal herpes simplex virus infection 442
Clinical signs 442
Diagnosis 442
Prognosis 442
Treatment 443
HIV infection 443
The initial human immunodeficiency virus infection 443
Dermatologic diseases associated with human immunodeficiency virus infection 443
12 Warts, herpes simplex, and other viral infections 448
Warts 448
Clinical infection 448
Immunologic response 448
Treatment 448
Warts: The primary lesion 449
Common warts 451
Treatment of recalcitrant warts 451
Imiquimod. 451
Apple cider vinegar. 451
Filiform and digitate warts 451
Flat warts 452
Plantar warts 453
Differential diagnosis 454
Treatment. 455
Debridement. 455
Combination therapy. 455
Keratolytic therapy (salicylic acid liquid). 455
Keratolytic therapy (40% salicylic acid plasters). 456
Apple cider vinegar. 456
5-Fluorouracil (5-FU). 456
Blunt dissection. 456
Imiquimod. 456
Suggestive therapy. 456
Cantharidin. 456
Laser. 456
Chemotherapy. 456
Formalin. 456
Cryosurgery. 456
Subungual and periungual warts 457
Molluscum contagiosum 458
Herpes simplex 460
Primary infection 460
Lesions 460
Recurrent infection 461
Oral-labial herpes simplex 462
Primary infection 462
Recurrent infection 462
Treatment. 463
Combination treatment. 463
Topical treatment. 463
Cutaneous herpes simplex 464
Eczema herpeticum 466
Varicella 468
Chickenpox in the immunocompromised patient 470
Chickenpox and HIV infection 471
Chickenpox during pregnancy 471
Congenital and neonatal chickenpox 471
Maternal varicella 471
First trimester. 471
Second trimester. 471
Near birth. 471
Laboratory diagnosis 471
Varicella vaccine 471
Treatment 472
Acyclovir 472
Gamma-globulin. 473
Herpes zoster 473
Herpes zoster after varicella immunization 477
Herpes zoster and HIV infection 477
Herpes zoster during pregnancy 477
Syndromes 477
Ophthalmic zoster 477
Clinical presentation. 477
Eye involvement. 477
Ramsay Hunt syndrome. 478
Sacral zoster (S2, S3, or S4 dermatomes). 479
Complications 479
Pregnancy 481
Differential diagnosis 481
Laboratory diagnosis 482
Varicella-zoster vaccine. 482
Infection control 482
Treatment 482
Treatment strategy. 482
Topical therapy. 482
Antiviral therapy 483
Treating acute pain 483
Prevention of postherpetic neuralgia 483
Treatment of postherpetic neuralgia 484
Treatment of herpes zoster and postherpetic neuralgia 485
13 Superficial fungal infections 487
Dermatophyte fungal infections 487
Tinea 490
Tinea of the foot 490
Clinical presentations. 491
Interdigital tinea pedis (toe web infection). 491
Two feet–one hand syndrome 492
Treatment. 492
Chronic scaly infection of the plantar surface. 492
Acute vesicular tinea pedis. 492
Pitted keratolysis 494
Tinea of the groin 495
Differential diagnosis 496
Intertrigo. 496
Erythrasma. 496
Treatment for tinea of the groin. 496
Tinea of the body and face 497
Round annular lesions. 497
Tinea corporis (tinea gladiatorum) 497
Deep inflammatory lesions. 497
Treatment. 500
Invasive dermatophyte infection. 501
Tinea of the hand 501
Tinea incognito 503
Tinea of the scalp 504
Organism and transmission. 504
Hair shaft infection. 504
Endothrix pattern of invasion. 505
Ectothrix pattern of invasion. 505
Microscopic patterns of hair invasion. 505
Clinical patterns of infection. 505
Diagnosis. 505
Trichophyton tonsurans 509
Four patterns of infection. 509
Noninflammatory black dot pattern. 509
Inflammatory tinea capitis (kerion). 510
Seborrheic dermatitis type. 510
Pustular type. 511
Differential diagnosis. 511
Id reaction to therapy. 511
Treatment. 511
Tinea of the beard 512
Superficial infection. 512
Deep follicular infection. 512
Treatment. 512
Treatment of fungal infections 514
Systemic agents (see tables 13-2 to 13-4) 514
Griseofulvin. 514
Adverse reactions. 515
Allylamines. 515
Terbinafine. 515
Indications. 515
Triazoles. 515
Itraconazole (sporanox). 515
Fluconazole (diflucan). 515
Ketoconazole (nizoral). 515
Candidiasis (moniliasis) 516
Candidiasis of normally moist areas 518
Vulvovaginitis 518
Vaginal discharge 518
Non–sexually-acquired discharge. 518
Bacterial vaginosis. 518
Sexually acquired discharge. 518
Syndromic management. 518
Optional tests. 518
Vulvovaginal candidiasis 520
Uncomplicated vulvovaginal candidiasis. 520
14 Exanthems and drug eruptions 534
Exanthems 535
Measles 535
Typical measles 536
Eruptive phase. 537
Management of measles 538
Vitamin A treatment. 538
Immunity. 538
Individuals exposed to disease. 538
Use of human immunoglobulin. 538
Revaccination risks. 538
Pregnancy. 538
Hand-foot-and-mouth disease 538
Scarlet fever 540
Rubella 543
Erythema infectiosum (parvovirus B19 infection) 544
Roseola infantum (human herpesvirus 6 and 7 infection) 547
Enteroviruses: Echovirus and coxsackievirus exanthems 549
Kawasaki disease 552
Superantigen toxin-mediated illnesses 558
Toxic shock syndrome 558
Cutaneous drug reactions 560
Drug eruptions: Clinical patterns and most frequent causal drugs (box 14-8) 562
Exanthems (maculopapular) 562
Urticaria 567
Pruritus 567
Drug eruptions 568
Severe cutaneous adverse drug reactions 568
DRESS syndrome 569
Erythema multiforme and toxic epidermal necrolysis 569
Acute generalized exanthematous pustulosis 569
Acneiform (pustular) eruptions 571
Eczema 571
Fixed drug eruptions 572
Blistering drug eruptions 574
Exfoliative erythroderma 574
Lichenoid (lichen planus–like drug eruptions) 574
Lupus erythematosus–like drug eruptions 575
Chemotherapy-induced acral erythema 575
Pigmentation 576
Photosensitivity 576
Vasculitis 576
Lymphomatoid drug eruptions 576
Skin eruptions associated with specific drugs 576
Interstitial granulomatous drug reaction 576
15 Infestations and bites 577
Scabies 577
Anatomic features, life cycle, and immunology of the mite 577
Anatomic features 577
Infestation and life cycle. 577
Immunology. 579
Clinical manifestations 579
Primary lesions 579
Burrow. 579
Vesicles and papules. 579
Secondary lesions 580
Distribution 580
Infants 582
The elderly 582
Crusted (Norwegian) scabies 583
Diagnosis 583
Burrow identification 583
Sampling techniques and slide mount preparation 584
Mineral oil mounts. 584
Potassium hydroxide wet mounts. 584
Adhesive tape. 584
Dermoscopy 584
Treatment and management 584
Permethrin 584
Lindane 584
Application technique for permethrin and lindane. 584
Benzyl benzoate 585
Crotamiton (eurax lotion) 585
Sulfur 585
Ivermectin (stromectol) 585
Scabies in long-term care facilities 587
Eradication program for nursing homes 587
Management of complications 587
Eczematous inflammation and pyoderma. 587
Post-scabietic pruritus. 587
Nodular scabies. 587
Environmental management. 587
Pediculosis 587
Biology and life cycle 587
Nits 588
Clinical manifestations 588
Pediculosis capitis 588
Pediculosis corporis 589
Eyelash infestation. 589
Pediculosis pubis 589
Diagnosis 589
Combing 589
Treatment 590
Head, body, and pubic lice 590
Permethrin. 590
Pyrethrin. 591
Malathion (ovide). 591
Lindane. 591
Ivermectin. 591
Ivermection lotion (sklice). 591
Spinosad. 591
Trimethoprim/sulfamethoxazole (bactrim, septra). 591
Nit removal 591
Wet combing (bug busting). 591
Pomades. 592
Hot air. 592
Fomite control. 592
“No nit” policies 592
Eye infestation 592
Spiders 592
Black widow spider 592
Clinical manifestations 593
Treatment 594
Immediate first aid. 594
Antivenin. 594
Muscle relaxants. 594
Analgesics. 594
Brown recluse spider 595
Clinical manifestations 595
Management 596
Moderate to severe skin necrosis. 596
Dapsone. 596
Steroids. 596
Surgery. 596
Antivenin. 596
Ticks 597
Lyme disease and erythema migrans 598
Geographic distribution 598
Cutaneous manifestations 599
Borrelia lymphocytoma. 599
Acrodermatitis chronica atrophicans. 599
Erythema migrans. 599
Early and late disease. 599
Three stages of infection 601
Early localized disease (erythema migrans and flulike symptoms). 601
Early disseminated disease (cardiac and neurologic disease). 602
Cardiac disease. 602
16 Vesicular and bullous diseases 635
Blisters 635
Autoimmune blistering diseases 635
Major blistering diseases 636
Classification 636
Epidermis 638
The basement membrane zone (see figure 16-2) 638
Basement membrane antigens and diseases. 638
Diagnosis of bullous disorders 639
Dermatitis herpetiformis and linear IgA bullous dermatosis 641
Gluten-sensitive enteropathy 644
Lymphoma 644
Diagnosis of dermatitis herpetiformis 644
Treatment 645
Bullae in diabetic persons 646
Pemphigus 647
Pathophysiology 647
Desmoglein 647
Dsg1 and Dsg3 autoantibodies. 647
Pemphigus vulgaris 647
Pemphigus foliaceus, IgA pemphigus, and pemphigus erythematosus 649
Pemphigus erythematosus 649
Pemphigus foliaceus 650
Fogo selvagem 650
Diagnosis of pemphigus 650
Treatment 651
Approach to treatment 652
Prednisone. 652
Course and remission 653
Risk of relapse 653
Conclusions 653
Determining remission and when to stop treatment. 653
Pemphigus in association with other diseases 653
Drug-induced versus drug-triggered pemphigus 654
Paraneoplastic pemphigus (neoplasia-associated pemphigus) 654
Laboratory diagnosis of paraneoplastic pemphigus 655
Histologic studies. 655
Direct immunofluorescence. 655
Indirect immunofluorescence. 655
The pemphigoid group of diseases 655
Bullous pemphigoid 655
Localized pemphigoid 660
Diagnosis 661
Treatment 661
Plan of therapy. 661
Topical therapy 661
Oral cavity. 661
Eyes. 661
Intralesional therapy. 661
Systemic therapy 661
Dapsone. 661
Corticosteroids. 661
Immunosuppressive agents (adjuvant therapy). 661
Antibiotics. 661
Other medications. 661
Surgical therapy. 661
Localized vulvar pemphigoid 662
Benign chronic bullous dermatosis of childhood 662
Herpes gestationis (pemphigoid gestationis) 662
Pemphigoid-like disease 663
Epidermolysis bullosa acquisita 663
Benign familial chronic pemphigus 664
Epidermolysis bullosa 666
The newborn with blisters, pustules, erosions, and ulcerations 667
17 Connective tissue diseases 673
Autoimmune diseases 673
Connective tissue diseases 673
Diagnosis 674
Antinuclear antibody screening 674
Connective tissue laboratory screening tests 678
Lupus erythematosus 680
Clinical classification 680
Subsets of cutaneous lupus erythematosus 682
Chronic cutaneous lupus erythematosus (discoid lupus erythematosus) 684
Subacute cutaneous lupus erythematosus 686
Systemic lupus erythematosus 688
Overview of SLE 688
Definition. 688
Clinical presentation. 688
Laboratory findings. 688
Diagnosis. 688
Treatment. 688
Hydroxychloroquine. 688
Belimumab. 688
Cutaneous disease 689
Other cutaneous signs of lupus erythematosus 690
Diagnosis and management of cutaneous lupus erythematosus 690
Neonatal lupus erythematosus 693
Drug-induced lupus erythematosus 694
Dermatomyositis and polymyositis 694
Polymyositis 695
Dermatomyositis 695
Scleroderma 702
Systemic sclerosis 702
Chemically induced scleroderma 702
Diffuse scleroderma 702
Initial signs and symptoms. 702
Skin. 702
Raynaud’s phenomenon. 705
Telangiectasias. 705
Gastrointestinal tract. 705
Lungs. 706
Kidneys. 706
Other organs. 706
Prognosis. 706
CREST syndrome 706
Diagnosis of diffuse scleroderma 707
Autoantibodies. 707
Other studies. 707
Office nailfold capillary microscopy 707
Normal. 708
Overlap syndromes (scleroderma, dermatomyositis). 708
Mixed connective tissue disease. 708
Lupus. 708
Treatment 708
Systemic therapy. 708
Management of cutaneous disease. 708
Morphea (localized scleroderma) 709
Classification 709
Lesion progression. 709
Differentiation from systemic sclerosis. 710
Systemic manifestations. 710
Autoimmunity and family history. 711
Biopsy. 711
Treatment. 711
Methotrexate and corticosteroids. 711
Linear scleroderma 711
Laboratory findings. 712
Treatment. 712
En coup de sabre 712
18 Hypersensitivity syndromes and vasculitis 713
Hypersensitivity syndromes 713
Erythema multiforme 713
Stevens-Johnson syndrome/toxic epidermal necrolysis spectrum of disease 717
Stevens-Johnson syndrome 718
Toxic epidermal necrolysis 720
Treatment 722
Erythema nodosum 723
Vasculitis 725
Vasculitis of small vessels 731
Hypersensitivity vasculitis 732
Henoch-Schönlein purpura 735
Neutrophilic dermatoses 739
Sweet’s syndrome (acute febrile neutrophilic dermatosis) 739
Erythema elevatum diutinum 741
Pyoderma gangrenosum 742
Schamberg’s disease 745
19 Light-related diseases and disorders of pigmentation 746
Photobiology 746
Sun-damaged skin 748
Suntan and sunburn 752
Sun protection 752
Polymorphous light eruption 756
Hydroa aestivale and hydroa vacciniforme 758
Porphyrias 760
Porphyria cutanea tarda 760
Treatment 764
Phlebotomy. 764
Chloroquine. 764
Pseudoporphyria 765
Phototoxic reactions 766
Photoallergy 769
Disorders of hypopigmentation 770
Vitiligo 770
Guidelines for the treatment of vitiligo 772
Children. 772
Adults. 773
Corticosteroids. 774
Topical calcineurin inhibitors. 774
Vitamin D3 analogues. 774
Narrow-band UVB. 774
Monochromatic excimer laser (308 nm). 774
Response to treatment. 775
Photochemotherapy. 775
Topical therapy. 775
Grafting and transplantation. 775
Systemic steroids. 775
Camouflage. 775
Depigmentation of remaining normal skin. 775
Idiopathic guttate hypomelanosis 776
Nevus anemicus 776
Tuberous sclerosis 777
Pityriasis alba 777
Disorders of hyperpigmentation 777
Freckles 777
Lentigo in children 778
Lentigo in adults 778
Melasma 779
Café-au-lait spots 782
Diabetic dermopathy 783
Erythema ab igne 783
20 Benign skin tumors 784
Seborrheic keratosis 784
Stucco keratoses 792
Skin tags (acrochordon) and polyps 792
Dermatosis papulosa nigra 794
Cutaneous horn 794
Dermatofibroma 795
Hypertrophic scars and keloids 796
Keratoacanthoma 797
Epidermal nevus 800
Nevus sebaceous 802
Chondrodermatitis nodularis helicis 803
Epidermal cyst 804
Pilar cyst (wen) 806
Senile sebaceous hyperplasia 807
Syringoma 808
21 Premalignant and malignant nonmelanoma skin tumors 809
Basal cell carcinoma 809
Pathophysiology 810
Histologic characteristics 810
Clinical types 810
Management and risk of recurrence 816
Recurrent basal cell carcinoma 817
Clinical presentation 817
Histologic type. 817
Location. 817
Size. 817
Treatment of basal cell carcinoma 818
Actinic keratosis 819
Lesion-directed therapy 824
Field-directed therapy 824
Treatment technique (5-FU) and expected results 825
Topical chemotherapy with imiquimod. 825
Inflammatory response and physician supervision. 825
Ingenol mebutate. 826
Photodynamic therapy. 826
Topical steroids. 826
Actinic keratosis of the face. 826
Actinic keratoses of the upper and lower extremities. 826
Actinic cheilitis. 826
Contact allergy to 5-FU. 826
Prognosis. 826
Squamous cell carcinoma in situ 827
Bowen’s disease 828
Erythroplasia of queyrat 829
Arsenical keratoses and other arsenic-related skin diseases 829
Squamous cell carcinoma 830
Leukoplakia 835
Verrucous carcinoma 836
Primary cutaneous lymphomas 837
Cutaneous T-cell lymphoma 837
Mycosis fungoides 837
Clinical criteria 840
Histopathologic criteria 840
Molecular biologic criteria 840
Immunopathologic criteria 840
Staging procedures. 842
Staging. 842
Prognosis. 842
Clinical presentations 842
Sézary syndrome 846
Paget’s disease of the breast 850
Extramammary Paget’s disease 851
Merkel cell carcinoma 852
Cutaneous metastasis 852
22 Nevi and malignant melanoma 855
Melanocytic nevi 855
Common moles 856
Management 858
Suspicious lesions. 858
Nevi. 858
Recurrent previously excised nevi (pseudomelanoma). 858
Nevi with small dark spots. 858
Special forms 858
Atypical nevi 865
Classification of atypical melanocytic nevi 866
Clinical classification 866
Clinical features of atypical moles 866
Morphology. 866
Surface characteristics. 866
Development and distribution. 866
Histologic characteristics. 868
Management. 868
Surgical excision and reexcision. 868
Malignant melanoma 868
Superficial spreading melanoma 871
Nodular melanoma 874
Lentigo maligna melanoma 876
Acral-lentiginous melanoma 878
Benign lesions that resemble melanoma 879
Lesion examination 879
Observation plus magnification plus dermoscopy. 879
Screening for melanoma. 879
Progression of melanoma 880
Radial growth phase tumors. 880
Vertical growth phase tumors. 880
Management of melanoma 881
Biopsy 881
Staging workup and follow-up 881
Surgical management 884
Staging and prognosis 887
Medical treatment 889
Dermoscopy 889
23 Vascular tumors and malformations 901
Congenital vascular lesions 901
Hemangiomas of infancy 902
Superficial hemangiomas 902
Management 904
Nonintervention. 904
Topical propranolol. 904
Topical timolol gel. 904
Propranolol. 904
Corticosteroids. 904
Intralesional steroids. 905
Treating ulcers and rapidly proliferating lesions. 905
Local wound care. 905
Infection. 905
Lasers. 905
Topical imiquimod. 906
Surgery. 906
Interferon alfa-2b. 906
Deep hemangiomas 906
Kasabach-Merritt syndrome. 906
Hemangiomas associated with congenital abnormalities. 907
Malformations 908
Nevus flammeus (port-wine stains) 908
Systemic syndromes. 912
Sturge-Weber syndrome. 912
Klippel-Trénaunay syndrome. 912
Treatment. 913
Lasers. 913
Cosmetics. 913
Salmon patches 913
Acquired vascular lesions 914
Cherry angioma 914
Angiokeratomas 914
Venous lake 915
Lymphangioma circumscriptum 915
Pyogenic granuloma (lobular capillary hemangioma) 916
Bacillary angiomatosis 916
Kaposi’s sarcoma 917
Telangiectasias 920
Spider angiomas 920
Hereditary hemorrhagic telangiectasia 921
Scleroderma 922
Unilateral nevoid telangiectasia syndrome 922
Generalized essential telangiectasia 922
24 Hair diseases 923
Anatomy 923
Physiology 925
Evaluation of hair loss 927
Generalized hair loss 930
Localized hair loss 932
Androgenetic alopecia in men (male pattern baldness) 932
Dutasteride 934
Hair transplants. 934
Scalp reduction and flaps. 934
Hair weaves. 934
Adrenal androgenic female pattern alopecia 934
Hirsutism 936
Alopecia areata 942
Prevalence 942
Clinical presentation. 943
Psychologic implications. 944
Nail changes. 944
Prognosis. 944
Differential diagnosis. 944
Etiology. 944
Immunologic factors. 945
Pathology. 945
Treatment. 945
Observation. 945
Topical steroids. 945
Intralesional injections. 945
Minoxidil (topical solution or foam). 945
Anthralin. 947
Topical immunotherapy. 947
Systemic corticosteroids. 947
Cyclosporine. 947
Hair weaves and wigs. 947
Trichotillomania 948
Traction (cosmetic) alopecia 949
Scarring alopecia 950
Chronic cutaneous lupus erythematosus 951
Lichen planopilaris 952
Lichen planopilaris with frontal sclerosing alopecia 953
Pseudopelade 954
Folliculitis decalvans 955
Dissecting cellulitis 956
Acne keloidalis 957
Tufted folliculitis. 958
Acne necrotica 959
Erosive pustular dermatosis 959
Trichomycosis 959
25 Nail diseases 960
Anatomy and physiology 960
Normal variations 961
Nail disorders associated with skin disease 964
Acquired disorders 966
Bacterial and viral infections 966
Fungal nail infections 969
Treatment 972
Oral agents: Terbinafine, itraconazole, fluconazole. 972
Continuous terbinafine. 972
Prognostic factors. 972
Response to treatment. 974
Preventing recurrence. 974
Drug interactions. 974
Laboratory monitoring. 974
Safety of oral agents. 974
Recurrence rates. 974
Laser and light therapy. 974
Mechanical reduction of infected nail plate. 974
Surgical removal. 974
Nonsurgical avulsion of nail dystrophies. 974
Topical medication. 974
Trauma 975
Onycholysis 975
Treatment 975
Photoonycholysis 975
Nail and cuticle biting 976
Nail plate excoriation 976
Hangnail 976
Ingrown toenail 976
Treatment 976
Ingrown nail without inflammation. 976
Ingrown nail with inflammation. 976
Recurrent ingrown nail. 976
Subungual hematoma 977
Nail hypertrophy 977
White spots or bands 977
Distal plate splitting (brittle nails) 977
Habit-tic deformity 977
Median nail dystrophy 978
Pincer nails (curvature) 978
The nail and internal disease 979
Color and drug-induced changes 981
Congenital anomalies 981
Tumors 982
26 Cutaneous manifestations of internal disease 986
Cutaneous manifestations of diabetes mellitus 986
Necrobiosis lipoidica 986
Granuloma annulare 988
Acanthosis nigricans 990
Xanthomas and dyslipoproteinemia 992
Neurofibromatosis 995
Neurofibromatosis 1 995
Clinical manifestations 995
Café-au-lait spots. 995
Presumptive evidence of neurofibromatosis 995
Neurofibromas. 996
Lisch nodules. 996
Systemic manifestations. 996
Natural history. 997
Diagnosis. 997
Segmental neurofibromatosis (NF5). 998
Genetic counseling. 998
Management. 998
Tuberous sclerosis 999
Internal cancer and skin disease 1002
Cutaneous paraneoplastic syndromes 1002
Familial cancer syndromes 1002
Cowden disease (multiple hamartoma syndrome) 1002
Muir-Torre syndrome 1004
Gardner’s syndrome 1005
Birt-Hogg-Dubé syndrome and renal carcinoma 1006
Chronic itch 1006
Central neuropathic itch 1006
27 Dermatologic surgical procedures e
Antibiotic prophylaxis e
Mohs’ micrographic surgery—indications for antibiotics e
Local anesthesia e
Hemostasis e
Wound healing e
Postoperative wound care e
Partial- and full-thickness open wounds e
Sutured wounds e
Office. e
Home. e
Excess granulation tissue. e
Scarlet red gauze. e
Scar formation. e
Skin biopsy e
Punch biopsy e
Shave biopsy and shave excision e
Simple scissor excision e
Electrodesiccation and curettage e
Curettage e
Blunt dissection e
Cryosurgery e
Extraction of cysts e
Mohs’ micrographic surgery e
Chemical peels e
Dermal and subdermal fillers e
Liposuction e
Lasers e
Intense pulsed light e
Botulinum toxin e
Index I-
A I-
B I-
C I-
D I-
E I-
F I-
G I-
H I-
I I-
J I-
K I-
L I-
M I-
N I-
O I-
P I-
Q I-
R I-
S I-
T I-
U I-
V I-
W I-
X I-
Y I-
Z I-
Corticosteroids (topical) es