Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…pemphigoid. Most milia, however, represent tiny infundibular cysts. Columns of parakeratosis known as cornoid lamellae emanate at times from infundibula of several “types” of porokeratosis, just as they do in those same types from surfac…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Subcutaneous Fat: Panniculitis

…s of adipocytes. A. Granular fat necrosis. B. Fat “microcysts.” C. Membranous fat necrosis. D. Foamy histiocytes (foam cells, lipophages). E. Calcification in the subcutaneous fat. Granular fat necrosis (complete loss of outlines of adip…

Histologic Diagnosis of Inflammatory Skin Diseases

Rosacea

…sebocytes in sebaceous glands and development of infundibular cysts that rupture and induce thereby granulomatous and fibrosing inflammation; metaphyma is an analogue of rhinophyma on the face, usually the forehead, of a patient with rosacea. Periora…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…10. Cornification of neoplastic trichoblasts (i.e., “cysts” that contain corneocytes) common 10. “Cysts” that contain corneocytes uncommon 11. Foreign-body granulomas common around cornified cells from ruptured “cys…

Histologic Diagnosis of Inflammatory Skin Diseases

Phaeohyphomycosis

…ess, and fever. Abscesses caused by rupture of infundibular cysts are associated with signs of inflammation, but no symptoms systemic. Findings histopathologic Fully developed Subcutaneous abscess Histiocytes, some of them multinucleate, and lym…