SECTION 1 ANATOMY, EMBRYOLOGY, AND PHYSIOLOGY<br>1.1 Embryology of the Skin<br>1.2 Normal Skin Anatomy<br>1.3 Normal Skin Histology<br>1.4 Skin Physiology: The Process of Keratinization<br>1.5 Normal Skin Flora<br>1.6 Vitamin D Metabolism<br>1.7 Photobiology<br>1.8 Wound Healing<br>1.9 Morphology: Lichenification, Plaques, and Fissures<br>1.10 Morphology: Macules, Patches, and Vesiculopustules<br><br>SECTION 2 BENIGN GROWTHS<br>2.1 Acrochordon<br>2.2 Becker’s Nevus (Smooth Muscle Hamartoma)<br>2.3 Dermatofibroma (Sclerosing Hemangioma)<br>2.4 Eccrine Poroma<br>2.5 Eccrine Spiradenoma<br>2.6 Eccrine Syringoma<br>2.7 Ephelides and Lentigines<br>2.8 Ephelides and Lentigines (Continued)<br>2.9 Epidermal Inclusion Cyst<br>2.10 Epidermal Nevus<br>2.11 Fibrofolliculoma<br>2.12 Fibrous Papule<br>2.13 Ganglion Cyst<br>2.14 Glomus Tumor and Glomangioma<br>2.15 Hidradenoma Papilliferum<br>2.16 Hidrocystoma<br>2.17 Keloid and Hypertrophic Scar<br>2.18 Leiomyoma<br>2.19 Lichenoid Keratosis<br>2.20 Lipoma<br>2.21 Median Raphe Cyst<br>2.22 Melanocytic Nevi: Blue Nevi<br>2.23 Melanocytic Nevi: Common Acquired Nevi and Giant Congenital Melanocytic Nevi<br>2.24 Melanocytic Nevi: Congenital Nevi<br>2.25 Milia<br>2.26 Neurofibroma<br>2.27 Nevus Lipomatosus Superficialis<br>2.28 Nevus of Ota and Nevus of Ito<br>2.29 Nevus Sebaceous<br>2.30 Osteoma Cutis<br>2.31 Palisaded Encapsulated Neuroma<br>2.32 Pilar Cyst (Trichilemmal Cyst)<br>2.33 Porokeratosis<br>2.34 Pyogenic Granuloma<br>2.35 Reticulohistiocytoma<br>2.36 Seborrheic Keratosis<br>2.37 Spitz Nevus<br><br>SECTION 3 MALIGNANT GROWTHS<br>3.1 Adnexal Carcinoma<br>3.2 Angiosarcoma<br>3.3 Basal Cell Carcinoma: Basic Facial Anatomy<br>3.4 Basal Cell Carcinoma: Clinical and Histologic Evaluation<br>3.5 Bowen Disease<br>3.6 Bowenoid Papulosis<br>3.7 Cutaneous Metastases<br>3.8 Dermatofibrosarcoma Protuberans<br>3.9 Mammary and Extramammary Paget Disease<br>3.10 Kaposi Sarcoma<br>3.11 Keratoacanthoma<br>3.12 Melanoma: Mucocutaneous Malignant Melanoma<br>3.13 Melanoma: Metastatic Melanoma<br>3.14 Melanoma: Therapeutics<br>3.15 Merkel Cell Carcinoma<br>3.16 Mycosis Fungoides: Clinical Subtypes of Cutaneous T-Cell Lymphoma<br>3.17 Mycosis Fungoides: Histologic Analysis of Cutaneous T-Cell Lymphoma<br>3.18 Sebaceous Carcinoma<br>3.19 Squamous Cell Carcinoma: Genital Squamous Cell Carcinoma<br>3.20 Squamous Cell Carcinoma: Clinical and Histologic Evaluation<br><br>SECTION 4 RASHES<br>4.1 Acanthosis Nigricans<br>4.2 Acne: Vulgaris<br>4.3 Acne: Variants<br>4.4 Acne: Keloidalis Nuchae<br>4.5 Acute Febrile Neutrophilic Dermatosis (Sweet Syndrome)<br>4.6 Allergic Contact Dermatitis: Morphology<br>4.7 Allergic Contact Dermatitis: Patch Testing and Type IV Hypersensitivity<br>4.8 Atopic Dermatitis: Infants and Children<br>4.9 Atopic Dermatitis: Adolescents and Adults<br>4.10 Autoinflammatory Syndromes: Pathophysiology<br>4.11 Autoinflammatory Syndromes: Clinical Manifestations<br>4.12 Bug Bites: Brown Recluse Spiders and Scabies Mites<br>4.13 Bug Bites: Arthropods and Diseases They Carry<br>4.14 Calciphylaxis<br>4.15 Cutaneous Lupus: Band Test<br>4.16 Cutaneous Lupus: Systemic Manifestations of Systemic Lupus Erythematosus<br>4.17 Cutaneous Lupus: Manifestations<br>4.18 Cutis Laxa<br>4.19 Dermatomyositis: Manifestations<br>4.20 Dermatomyositis: Cutaneous and Laboratory Findings<br>4.21 Disseminated Intravascular Coagulation<br>4.22 Elastosis Perforans Serpiginosa<br>4.23 Eruptive Xanthomas: Congenital Hyperlipoproteinemia<br>4.24 Eruptive Xanthomas: Acquired Hyperlipoproteinemia<br>4.25 Erythema Ab Igne<br>4.26 Erythema Annulare Centrifugum<br>4.27 Erythema Multiforme, Stevens-Johnson Syndrome, and Toxic Epidermal Necrolysis<br>4.28 Erythema Multiforme, Stevens-Johnson Syndrome, and Toxic Epidermal Necrolysis (Continued)<br>4.29 Erythema Nodosum<br>4.30 Fabry Disease<br>4.31 Fixed Drug Eruption<br>4.32 Gout: Gouty Arthritis<br>4.33 Gout: Tophaceous Gout<br>4.34 Graft-Versus-Host Disease<br>4.35 Granuloma Annulare<br>4.36 Graves Disease and Pretibial Myxedema<br>4.37 Hidradenitis Suppurativa (Acne Inversa)<br>4.38 Infantile Hemangiomas<br>4.39 Irritant Contact Dermatitis<br>4.40 Keratosis Pilaris<br>4.41 Langerhans Cell Histiocytosis: Presentation in Childhood<br>4.42 Langerhans Cell Histiocytosis: Eosinophilic Granuloma<br>4.43 Leukocytoclastic Vasculitis<br>4.44 Lichen Planus<br>4.45 Lichen Simplex Chronicus<br>4.46 Lower Extremity Vascular Insufficiency<br>4.47 Mast Cell Disease<br>4.48 Mast Cell Disease: Degranulation Blockers<br>4.49 Morphea<br>4.50 Myxedema<br>4.51 Necrobiosis Lipoidica<br>4.52 Necrobiotic Xanthogranuloma<br>4.53 Neutrophilic Eccrine Hidradenitis<br>4.54 Ochronosis: Metabolic Pathway and Cutaneous Findings<br>4.55 Ochronosis: Systemic Findings<br>4.56 Oral Manifestations in Blood Dyscrasias<br>4.57 Phytophotodermatitis<br>4.58 Pigmented Purpura<br>4.59 Pityriasis Rosea<br>4.60 Pityriasis Rubra Pilaris<br>4.61 Polyarteritis Nodosa<br>4.62 Pruritic Urticarial Papules and Plaques of Pregnancy<br>4.63 Pseudoxanthoma Elasticum<br>4.64 Psoriasis: Histopathologic Features and Typical Distribution<br>4.65 Psoriasis: Inverse Psoriasis and Psoriasis in the Genital Area<br>4.66 Psoriasis: Psoriatic Arthritis<br>4.67 Radiation Dermatitis<br>4.68 Reactive Arthritis (Reiter Syndrome)<br>4.69 Rosacea<br>4.70 Sarcoid: Cutaneous Manifestations<br>4.71 Sarcoid: Systemic Manifestations<br>4.72 Scleroderma (Systemic Sclerosis)<br>4.73 Seborrheic Dermatitis<br>4.74 Skin Manifestations of Inflammatory Bowel Disease: Mucocutaneous Manifestations<br>4.75 Skin Manifestations of Inflammatory Bowel Disease: Cutaneous Manifestations<br>4.76 Stasis Dermatitis<br>4.77 Urticaria<br>4.78 Vitiligo<br><br>SECTION 5 AUTOIMMUNE BLISTERING DISEASES<br>5.1 Basement Membrane Zone, Hemidesmosome, and Desmosome<br>5.2 Basement Membrane Zone, Hemidesmosome, and Desmosome (Continued)<br>5.3 Bullous Pemphigoid<br>5.4 Mucous Membrane Pemphigoid<br>5.5 Dermatitis Herpetiformis<br>5.6 Epidermolysis Bullosa Acquisita<br>5.7 Linear Immunoglobulin A Bullous Dermatosis<br>5.8 Paraneoplastic Pemphigus<br>5.9 Pemphigus Foliaceus<br>5.10 Pemphigus Vulgaris<br>SECTION 6 INFECTIOUS DISEASES<br>6.1 Actinomycosis<br>6.2 Blastomycosis<br>6.3 Chancroid<br>6.4 Coccidioidomycosis<br>6.5 COVID-19<br>6.6 Cryptococcosis<br>6.7 Cutaneous Larva Migrans<br>6.8 Dermatophytoses: Tinea Faciei and Tinea Corporis<br>6.9 Dermatophytoses: Tinea Cruris and Tinea Capitis<br>6.10 Dermatophytoses: Tinea Pedis and Tinea Unguium<br>6.11 Herpes Simplex Virus: Lesions<br>6.12 Herpes Simplex Virus: Lesions (Continued)<br>6.13 Herpes Simplex Virus: Encephalitis<br>6.14 Histoplasmosis<br>6.15 Leprosy (Hansen Disease)<br>6.16 Lice: Clinical Manifestations<br>6.17 Lice: Clinical Findings and Management<br>6.18 Lyme Disease<br>6.19 Lymphogranuloma Venereum<br>6.20 Meningococcemia: Acute Adrenal Insufficiency (Waterhouse-Friderichsen Syndrome)<br>6.21 Meningococcemia: Bacterial Meningitis<br>6.22 Molluscum Contagiosum<br>6.23 Paracoccidioidomycosis<br>6.24 Scabies<br>6.25 Sporotrichosis<br>6.26 Staphylococcus aureus Skin Infections: Types of Skin Infections<br>6.27 Staphylococcus aureus Skin Infections: Toxic Shock Syndrome<br>6.28 Syphilis: Genitalia<br>6.29 Syphilis: Oral Cavity<br>6.30 Syphilis: Pregnancy<br>6.31 Varicella<br>6.32 Herpes Zoster (Shingles): Clinical Presentation<br>6.33 Herpes Zoster (Shingles): Varicella Zoster With Keratitis<br>6.34 Verrucae (Warts): Human Papillomavirus (HPV) Infection<br>6.35 Verrucae (Warts): Condylomata Acuminata (Genital Warts)<br><br>SECTION 7 HAIR AND NAIL DISEASES<br>7.1 Normal Structure and Function of the Hair Follicle Apparatus<br>7.2 Normal Structure and Function of the Nail Unit<br>7.3 Alopecia Areata<br>7.4 Androgenic Alopecia<br>7.5 Common Nail Disorders: Fingernail Disorders<br>7.6 Common Nail Disorders: Toenail Disorders<br>7.7 Common Nail Disorders (Continued)<br>7.8 Hair Shaft Abnormalities<br>7.9 Telogen Effluvium and Anagen Effluvium<br>7.10 Trichotillomania<br><br>SECTION 8 NUTRITIONAL AND METABOLIC DISEASES<br>8.1 Beriberi: Sources and Metabolism of Thiamine (Vitamin B1)<br>8.2 Beriberi: Clinical Manifestations of Dry and Wet Beriberi<br>8.3 Hemochromatosis<br>8.4 Metabolic Diseases: Niemann-Pick Disease, von Gierke Disease, and Galactosemia<br>8.5 Pellagra: Main Sources, Causes, and Skin Findings<br>8.6 Pellagra: Mucosal and Central Nervous System Manifestations<br>8.7 Phenylketonuria: Normal and Abnormal Metabolism<br>8.8 Phenylketonuria: Clinical Manifestations and Hereditary Patterns<br>8.9 Porphyria Cutanea Tarda<br>8.10 Scurvy: Dietary Sources of Vitamin C and Classic Cutaneous Manifestations<br>8.11 Scurvy: Bony and Skin Abnormalities<br>8.12 Vitamin A Deficiency<br>8.13 Vitamin K Deficiency and Vitamin K Antagonists: Potential Clinical Consequences of Warfarin Use<br>8.14 Vitamin K Deficiency and Vitamin K Antagonists: Anticoagulation Effects on the Clotting Cascade<br>8.15 Wilson Disease<br><br>SECTION 9 GENODERMATOSES AND SYNDROMES<br>9.1 Addison Disease<br>9.2 Amyloidosis<br>9.3 Basal Cell Nevus Syndrome<br>9.4 Carney Complex<br>9.5 Cushing Syndrome and Cushing Disease<br>9.6 Cushing Syndrome: Pathophysiology<br>9.7 Down Syndrome<br>9.8 Ehlers-Danlos Syndrome<br>9.9 Marfan Syndrome<br>9.10 Muir-Torre Syndrome<br>9.11 Neurofibromatosis: Cutaneous Manifestations<br>9.12 Neurofibromatosis: Cutaneous and Skeletal Manifestations<br>9.13 Tuberous Sclerosis