Search Results for: folliculo-apocrine cystic hamartoma

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…and trichodiscoma are different names for the same hamartoma at different stages in development of it. At an early stage the hamartoma is named fibrofolliculoma; later the same process is called trichodiscoma. Although an infundibulum of epidermis…

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

Mammary Paget’s disease is an apocrine carcinoma that begins in mammary glands and extends along lactiferous ducts to the epidermis where it is seen clinically as a scaly, crusted, or eroded plaque on the nipple or areola of women mostly, and…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eruptive Vellus Hair Cyst?

…that of the infundibulum of epidermis, the infundibulum and isthmus being in continuity normally. In short, cutaneous cysts, cystic hamartomas, and cystic neoplasms may display more than one type of adnexal epithelium in their lining. That is the…

Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…er, that is, surface and infundibular. The apocrine unit springs from the infundibulum. 1The conventional designation “folliculosebaceous-apocrine unit” is incorrect here because in an embryo, the apocrine unit derives from infundibular…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…l adnexal structures in skin seen in the course of embryologic development or in postnatal humans. The epithelial adnexa are folliculo-sebaceous-apocrine units on one hand and eccrine units on the other; the nonepithelial adnexa are smooth muscles,…

Differential Diagnosis in Dermatopathology

Discussions

Infundibulo-folliculo-sebaceous cystic hamartoma and steatocystoma are both cystic hamartomas. Neither is simply a cyst because the structures that comprise each of them are not mere epithelium-lined sacs that house fluid or solid elements, but are…