Structure and function Cutaneous signs and diagnosis Dermatoses resulting from physical factors Pruritus and neurocutaneous diseases Atopic dermatitis, eczema, and noninfectious immunodeficiency disorders Contact dermatitis and drug eruptions Erythema and urticaria Connective tissue diseases Mucinoses Seborrheic dermatitis, psoriasis, recalcitrant palmoplantar eruptions, pustular dermatitis, and erythroderma Pityriasis rosea, pityriasis rubra pilaris, and other papulosquamous and hyperkeratotic diseases Lichen planus and related conditions Acne Bacterial infections Diseases resulting from fungi and yeasts Mycobacterial diseases Hansen disease Syphilis, yaws, bejel, and pinta Viral diseases Parasitic infestations, stings, and bites Chronic blistering dermatoses Nutritional diseases Diseases of subcutaneous fat Endocrine diseases Abnormalities of dermal fibrous and elastic tissue Errors in metabolism Genodermatoses and congenital anomalies Dermal and subcutaneous tumors Epidermal nevi, neoplasms, and cysts Melanocytic nevi and neoplasms Macrophage/monocyte disorders Cutaneous lymphoid hyperplasia, cutaneous t-cell lymphoma, other malignant lymphomas, and allied diseases Diseases of skin appendages Diseases of mucous membranes Cutaneous vascular diseases Disturbances of pigmentation