Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous inflammati…

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…