Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…oliferate to become the infundibular epidermis, apocrine unit, sebaceous unit, and hair follicle. The bulge of the follicle situated beneath the future sebaceous gland represents the presumptive attachment site for muscles of hair erection. The futur…

Ocular Inflammation

Ocular Inflammation

…es and differences between Meibomian glands of the eyelids and sebaceous glands in the folliculosebaceous unit of the skin.[13] The authors postulated that “abnormalities of keratinization” may be responsible for what they called “M…

Differential Diagnosis in Dermatopathology

Discussions

…is emitted as a consequence of the effects of bacteria on the sebaceous material within them. Sebaceous secretion enters infundibular cysts from lobules of sebaceous glands via sebaceous ducts that are continuous with the base of them. When infundib…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…d hair follicle nevus. Eccrine adenoma Eccrine hidrocystoma or cystadenoma Syringoma: classic eyelid type, eruptive type, clear cell type, chondroid type Papillary eccrine adenoma (eccrine syringocyst-adenoma papilliferum) (cutaneous ciliated cyst) E…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…undibulum-like structure, often without a distinct intervening sebaceous duct 7. Normal sebaceous follicles or vellus follicles are present within the section of tissue; no sign of alopecia 7. No or few normal folliculo-sebaceous units are present…

Differential Diagnosis in Dermatopathology

Discussions

…nfundibular rete ridges of dilated pore are devoid of ducts or cysts, whereas the lobules of pilar sheath acanthoma usually contain structures like sebaceous ducts and cysts that house cornified cells. Last, dilated pore shows no evidence of follicul…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Basal-Cell Carcinoma Common in Nevus Sebaceus?

…127. The development of basal cell carcinoma within a naevus sebaceous of Jadassohn (NSJ) has commonly been reported. Ball EA, Hussain M, Moss AL. Squamous-cell carcinoma and basal-cell carcinoma arising in a naevus sebaceous of Jadassohn: case rep…

Differential Diagnosis in Dermatopathology

Discussions

Both sebaceous hyperplasia and nevus sebaceus of Jadassohn consist of abnormalities of sebaceous glands but the former, as the name denotes, is a hyperplasia, whereas the latter is a hamartoma that involves not only sebaceous units, but other adnexa…