Section I. Basic Nomenclature, Structure and Methods: Structure, Function, And Reaction Patterns. Diagnostic Methodology: Immunofluorescence. Section II. Inflammatory Dermatoses: Spongiotic Dermatitis. Psoriasiform Dermatitis. Vesiculobullous Dermatitis. Cytotoxic Dermatitis. Angiocentric Dermatitis. Granulocytic Dermatitis. Granulomatous Dermatitis. Cutaneous Panniculitis. Section III. Neoplasms: Epidermal Tumors. Adnexal Tumors. Melanocytic Tumors. Lymphoproliferative Tumors. Primary Mesenchymal Tumors. Metastatic Tumors to Skin. Section IV. Pigmentary, Systemic-Metabolic, And Degenerative Disorders: Cutaneous Pigmentary Disorders. Maturational and Degenerative Disorders. Dermatopathology of Systemic Disease. Section V. Regional Dermatopathology: Dermatopathology of Hair. Dermatopathology of Nails. Dermatopathology of Anogenital Skin. Dermatopathology of Oral Mucosa. Dermatopathology of the Ocular Adnexa. Comparative Dermatopathology.