Preface Acknowledgments Introduction to the VisualDx: Essential Dermatology Series Introduction to VisualDx: Essential Dermatology in Pigmented Skin Online 1: Approach to the Dermatology Patient 2: Examination of Pigmented Skin 3: Morphology and Distribution 4: Essential Skin Diseases 4-1: Multiple Lesions or Rash in the Febrile, Ill, or Toxic Patient Scarlet Fever Human Immunodeficiency Virus (HIV) Primary Infection Rocky Mountain Spotted Fever Secondary, Tertiary, and Congenital Syphilis Necrotizing Fasciitis Drug Hypersensitivity Syndrome (DRESS Syndrome) Kawasaki Disease Systemic Lupus Erythematosus (SLE) Disseminated Purpuras Erysipelas Ecthyma Gangrenosum Toxic Shock Syndrome Exfoliative Dermatitis Calciphylaxis Leukocytoclastic Vasculitis and Gonococcemia Henoch-Sch\u00f6nlein Purpura Frostbite Viral Exanthems (Rubeola [Measles], Cytomegalovirus [CMV] Infection, and Asymmetric Periflexural Exanthem of Childhood) Erythema Infectiosum (Fifth Disease) Gianotti-Crosti Syndrome Cellulitis Dermatomyositis Erythema Annulare Centrifugum and Lyme Disease 4-2 : Multiple Erythematous Lesions or Rash in the Well Patient Drug Eruption (Morbilliform and Urticarial) Pityriasis Rosea Pruritic Urticarial Papules Plaques of Pregnancy (PUPPP) Urticaria, Angioedema, and Dermographism Drug-Induced Photosensitive Reaction 4-3: Lesions with Prominent Pigmentary Change Acanthosis Nigricans Peutz-Jeghers Syndrome and Linear and Whorled Nevoid Hypermelanosis Genetic Disorders of Pigmentation Pityriasis Alba Confluent and Reticulated Papillomatosis Urticaria Pigmentosa and Mastocytoma Congenital Nevus Including Giant Congenital Nevus Drug-Induced Pigmentation Erythema Dyschromicum Perstans Fixed Drug Eruption Lentigo Simplex Melanoma, Acral Lentiginous Melanoma, Lentigo Maligna, and Lentigo Maligna Melanoma Oral Melanotic Macule Melasma Flat Pigmented Lesions Spitz Nevus Nevus, Becker\u2019s Nevi (Moles)v Nevus, Blue Post-Inflammatory Hyperpigmentation and Notalgia Paresthetica Seborrheic Keratosis and Dermatosis Papulosa Nigra Vitiligo 4-4 : Lesions with Prominent Vasculature or Purpura Physical Abuse Stasis Dermatitis, Stasis Ulcer (Venous Ulcer), and Capillaritis Cutis Marmorata Vascular Malformations Kaposi Sarcoma Livedo Reticularis and Erythema Ab Igne Port-Wine Stain Pyogenic Granuloma Spider Angioma Subacute Bacterial Endocarditis (SBE) Raynaud\u2019s Phenomenon 4-5 : Smooth Papules / Plaques / Nodules – Few Dermatofibromas Solitary Neurofibroma Basal Cell Carcinoma Pilomatricoma Keloid and Hypertrophic Scar Xanthelasma Palpebrarum Juvenile Xanthogranuloma 4-6 : Smooth Papules / Plaques / Nodules – Many Molluscum Contagiosum Sarcoidosis Leprosy (Hansen\u2019s Disease) Lymphomatoid Papulosis Tuberous Sclerosis Pseudoxanthoma Elasticum Appendageal Tumors Flat Warts Miliaria Rubra Granuloma Annulare Histiocytosis Polymorphous Light Eruption Neurofibromatosis Xanthomas 4-7 : Scaling or Crusted Papules / Plaques / Nodules – Few Epidermal Nevus Nummular Dermatitis Common Warts Pediculosis Corporis (Body Lice) Lichen Simplex Chronicus Lichen Striatus Discoid Lupus Erythematosus Squamous Cell Carcinoma Tinea Corporis Non-Bullous Impetigo Pityriasis lichenoides et varioliformis acuta (PLEVA) 4-8: Scaling or Crusted Papules / Plaques / Nodules – Many Xerosis and Eczema Craquel\u00e9 (Asteatotic Dermatitis) Ichthyoses Seborrheic Dermatitis Lichen Planus and Lichen Nitidus Lupus Erythematosus, Subacute Cutaneous Psoriasis and Pustular Psoriasis Tinea Versicolor Keratosis Pilaris Prurigo Nodularis Scabies Atopic Dermatitis (Eczema) Folliculitis Perforating Diseases Neurotic Excoriations 4-9: Fluid-Filled Lesions (Vesicles / Bullae / Pustules) Infantile Acropustulosis Bullous Disorders e-height: normal"Incontinentia Pigmenti Contact Dermatitis Erythema Multiforme Minor Erythema Toxicum Neonatorum Hand-Foot-and-Mouth Disease Neonatal Herpes Herpes Zoster (Shingles) Bullous Impetigo Larva Migrans Lymphangioma Circumscriptum (Microcystic Lymphatic Malformation) Miliaria Crystallina Pustular Psoriasis (see Psoriasis, page…) Transient Neonatal Pustular Melanosis Staphylococcal Scalded Skin Syndrome Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis Graft-Versus-Host Disease Varicella Porphyria Cutanea Tarda Neonatal Candidiasis 4-10 : Atrophy / Sclerosis Scleroderma and CREST Syndrome Radiation Dermatitis Striae and Steroid Atrophy Necrobiosis Lipoidica and Diabetic Dermopathy Neonatal Lupus Erythematosus Erythrasma and Intertrigo Ischemic Ulcer (Arterial Ulcer) Pressure Ulcer (Decubitus Ulcer) Factitial Dermatitis and Factitial Ulcers Pyoderma Gangrenosum 4-11: Limited Number of Lesions or Growths Soft Tissue Tumors Cysts Ecthyma Erythema Nodosum Gout Hidradenitis Suppurativa Cutaneous T-Cell Lymphomas Morphea Bite or Sting, Arthropod (Insect Bites) Bite, Spider Acrochordon Calcinosis Cutis Abscess and Abscess of the Newborn Majocchi\u2019s Granuloma Deep Fungus and Other Infections Cutaneous Leishmaniasis Sweet\u2019s Syndrome (Acute Febrile Neutrophilic Dermatosis) Mycobacterium Marinum and Other Atypical Mycobacterial Infections Furuncle and Carbuncle 4-12: Special Locations Multiple Facial / Neck Lesions Pseudofolliculitis Barbae, Tinea Barbae, and Tinea Faciei Facial Dermatitis- Rosacea and Perioral Dermatitis Acne Milia Acne Keloidalis Nuchae Mouth Aphthous Ulcers Oral Candidiasis (Thrush) and Periodontal Disease Orofacial Herpes Leukoplakia, Oral Squamous Cell Carcinoma (SCC), and Hairy Leukoplakia Oral Melanotic Melanoma (see Oral Melanotic Macule, page…) Nails Onychomycosis Paronychia Pseudomonas Nail Infection Palms and Soles Juvenile Plantar Dermatosis l"Palmoplantar Keratoderma Tinea Pedis Plantar Warts, Corns (Clavi), and Calluses Dyshidrotic Dermatitis and Palmoplantar Pustulosis Blistering Distal Dactylitis Perineum Genital Candidiasis Condyloma Acuminatum (Genital Wart, HPV) Angiokeratoma of Scrotum Diaper Dermatitis- Irritant and Candida-associated Lichen Sclerosus et Atrophicus Tinea Cruris Pediculosis Pubis (Pubic Lice) Primary Syphilis and Other Sexually Transmitted Diseases Genital Herpes Scalp A Practical Approach to Patients with Hair Problems Non-Scarring Alopecia Ectodermal Dysplasias Scarring Alopecia Cephalohematoma Pediculosis Capitis 5: Medical, Surgical, and Cosmetic Dermatologic Therapies Index