Differential Diagnosis in Dermatopathology

Discussions

Trichoblastoma is the name generic for all benign neoplasms composed of trichoblasts and trichoblastic carcinoma is the term generic for all malignant neoplasms made up of trichoblasts. A synonym for trichoblastic carcinoma is basal-cell carcinoma….

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Differential Diagnosis in Dermatopathology

Discussions

Ascendency of the shave biopsy technique by dermatologists has created bedeviling problems for dermatopathologists and general pathologists because that slice (often sliver) method does not permit architectural patterns of skin diseases to be studie…

Differential Diagnosis in Dermatopathology

Discussions

Dermatofibroma and dermatofibrosarcoma protuberans are lesions made up of dense diffuse infiltrates of mesenchymal cells in company with bundles of collagen, the two together occupying at least much of the thickness of the dermis and sometimes part…

Histologic Diagnosis of Inflammatory Skin Diseases

Necrobiosis lipoidica

Necrobiosis lipoidica Synonyms Necrobiosis lipoidica diabeticorum Dermatitis atrophicans lipoidica diabetica Necrobiosis lipoidica granulomatosis Granulomatous tuberculoides pseudosclerodermiformis of Gottron Granulomatous disciformis chronica et pr…

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphocytoma cutis

Lymphocytoma cutis Synonyms Pseudolymphoma Presentation stereotypical Age and sex Any age in both sexes Distribution of lesions Face and extremities especially Individual lesions Papules and nodules Course Weeks, months, and sometimes years; usually…

Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

Keloid Presentation stereotypical Age and sex Young adults especially, both sexes, more often in darkly pigmented individuals, especially Africans and African-Americans Distribution of lesions Sternal region, ear lobes, shoulders, and the upper part…