Normal structure of skin technical data immunopathology of the skin general pathology - terminology systematics of histopathologic interpretation eczematous tissue reactions psoriasiform tissue reactions lichenoid and poikilodermatous tissue reactions toxic allergic, and multiform erythemas vesicular and bullous diseases inflammatory virus diseases miscellaneous papulosquamous eruptions lupus erythematosus and related conditions dermal vasculitides and other vascular disorders subcutaneous inflammations ulcers inflammation involving the pilosebaceous complex inflammation involving eccrine and apocrine glands predominantly mononuclear granulomas mixed cell granulomas palisading granulomas predominantly histocytic lesions Langerhans cell granulomas changes of collagen and ground substance disorders of elastic fibres various extracellular deposits Darier's, Hailey-Hailey's and Grover's diseases ichthyosiform dermatoses pigmentary disorders virus epidermoses melanocytic tumours and malformations epidermal nevi and benign epidermoid tumours epidermal precancer, squamous cell cercinoma, and pseudocarcinoma nevus sebaceus and sebaceous tumours hair nevi and hair follicle tumours cysts related to the adnexa sweat apparatus tumours basal cell epithelioma adenocarcinoma and metastatic carcinoma mesodermal nevi and tumours vascular nevi and tumours neural tumours lymphoproliferative neoplasms lesions for mucous membranes lesions of hair and nail.
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Amir H. Mehregan (1987) studied this question.