Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Blue Nevus?

…nofibroma, blue nevus of Jadassohn-Tiech√©, pilar neurocristic hamartoma, and dermal melanocytoma.” Rhodes AR. Neoplasms: benign neoplasias, hyperplasia, and dysplasias of melanocytes. In: Fitzpatrick TB, Eisen AZ, Wolff K, et al., eds. Dermato…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Verruciform Xanthoma?

…he end stage of a verruca that involuted); an alteration in a hamartoma, e.g., an epidermal nevus; a repeated insult, e.g., blisters of recessive dystrophic epidermolysis bullosa; and a change in a long-established neoplasm, e.g., squamous-cell carci…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Study By Disease

…c-catagen type, ruptured (Quiz #65) Folliculo-apocrine cystic hamartoma (Quiz #74) Foreign body granulomatous dermatitis and panniculitis secondary to Artecoll (Quiz #603) Foreign body reaction to a “filler” (Matridex) (Quiz #335) Frostbi…

Dermatology Practical & Conceptual

Dermatoscopic findings of atrophic dermatofibrosarcoma protuberans

…atrophic dermatofibroma and medallion-like dermal dendrocyte hamartoma. While DFSP cells are positive for CD34 and negative for factor XIIIa, atrophic dermatofibroma cells are usually negative for CD34 and both of CD34 and factor XIIIa are positive…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

…20;decapitation secretion.” The cystic component of the hamartoma known as steatocystoma is lined by epithelium just like that of a sebaceous duct, namely, a thin epithelium that possesses a basal, spinous, subtly granular, and thin cornified l…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…duct proliferation Eccrine-centered nevus Eccrine angiomatous hamartoma Syringofibroadenoma or acrosyringeal nevus Comedo nevus of the palm, linear eccrine nevus with comedone, porokeratotic eccrine ostial nevus or porokeratotic eccrine duct and hair…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Myxoma?

…Williams & Wilkins, 1990:1020. “Lastly, neoplastic-hamartomatous cutaneous mucinosis include mucinous nevus, a benign hamartoma, and myxoma, which is a benign tumor to be differentiated from reactive cutaneous focal mucinosis.” Rong…

Differential Diagnosis in Dermatopathology

Images

Infundibulo-folliculo-sebaceous cystic hamartoma Steatocystoma…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Infundibulo-folliculo-sebaceous cystic hamartoma Steatocystoma 1. Situated mostly in the dermis as a rule; sometimes also the subcutaneous fat 1. Situated in either the dermis or the subcutaneous fat, or both together 2. Cyst does not “p…