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…

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…

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

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…

Differential Diagnosis in Dermatopathology

Discussions

…nect, continuity with the infundibular epidermis, infundibular cystic structures, calcification of some of those cystic structures, clefts within the stroma, and sparse infiltrates of inflammatory cells. Despite the many similarities histopathologic…