Search Results for: folliculo-sebaceous cyst

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

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…

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…

Differential Diagnosis in Dermatopathology

Discussions

…, and, last, fibrosis. Historically, follicular cysts of the isthmus-catagen type have been called tricholemmal cysts, pilar cysts, sebaceous cysts, and wens. The lining of isthmus-catagen cysts is the same as that of the outer sheath at the isthmus…