Search Results for: infundibulo-sebaceous-apocrine unit

Differential Diagnosis in Dermatopathology

Discussions

…enlargement of a nose results from tremendous hyperplasia of sebaceous lobules and formation of many infundibular cysts that rupture, thereby sending contents of infundibula into the dermis and inducing suppurative granulomatous inflammation that cu…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Common Baldness—an Inflammatory Disease?

…creased percentages of telogen follicles and telogen germinal units. An inflammatory reaction was seen in 75% of patients and focal fibrosis was seen in 25%. Diffuse dermal fibrosis with destruction of follicular structures was present in 5% of the s…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…licular differentiation; no associated follicular papillae 3. Sebaceous cells and lobules often accompany follicles induced by histiocytes and fibrocytes 3. No sebaceous cells or lobules accompanying 4. No clefts between epithelial elements and strom…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Apocrine mixed tumor Eccrine mixed tumor 1. Asymmetrical 1. Symmetrical 2. Epithelial component not distributed in uniform fashion 2. Epithelial component distributed in relatively uniform manner 3. Some solid zones of neoplastic epithelium 3. No s…

Differential Diagnosis in Dermatopathology

Images

Apocrine (clear-cell) hidradenoma Eccrine (poroid) hidradenoma…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Apocrine (clear-cell) hidradenoma Eccrine (poroid) hidradenoma 1. Connects to infundibula often 1. No connection to infundibula; merges with surface epidermis rarely 2. Glandular structures usually 2. Ductal structures usually 3. “Decapitatio…

Differential Diagnosis in Dermatopathology

Images

Apocrine mixed tumor Eccrine mixed tumor…