Search Results for: folliculo-sebaceous cyst

Differential Diagnosis in Dermatopathology

Discussions

Infundibulo-folliculosebaceous 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…

Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…that is continuous above with surface epidermis and below with the isthmus of the hair follicle, actually is not part of the folliculosebaceous unit, but is epidermis, that particular epithelium being divisible morphologically in two parts…

Differential Diagnosis in Dermatopathology

Dilated pore vs. Pilar sheath acanthoma

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…

Differential Diagnosis in Dermatopathology

Discussions

…s benign and malignant neoplasms of sebaceous, eccrine, apocrine, or follicular differentiation, and follicular and apocrine cysts and cystic hamartomas. It used to be a matter of faith that the neoplasm most common in nevus sebaceus is basal-cell…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Basal-Cell Carcinoma Common in Nevus Sebaceus?

…hamartoma, proliferating pilar tumor, and sebaceous adenoma; and apocrine neoplasms (20%), such as apocrine adenoma, syringocystadenoma papilliferum, and apocrine hidrocystoma. . . . BCCs associated with nevus sebaceus frequently show features of…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Infundibular cyst Isthmus-catagen cyst 1. Cyst lining consists of stratified squamous epithelium that resembles normal infundibular epidermis, i.e., the cells flatten as they mature; the granular zone persists 1. Cyst lining consists of stratified…