Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

…ds may develop at sites of suppurative infundibulitis (“folliculitis”), e.g., acne keloidalis, but not all papules and nodules of that condition show bundles of collagen like that of a keloid. In time, however, in the middle of a mass of…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Perforating Folliculitis Elastosis Perforans Serpiginosa 1. Only a single focus of change pathologic as a rule in a 4-millimeter biopsy specimen 1. Several foci of change pathologic in a 4-millimeter biopsy specimen 2. Surface of the epidermis…

Histologic Diagnosis of Inflammatory Skin Diseases

Parasitic infestations

…DM, Schwartz RA. Cutaneous onchocercoma. Int J Dermatol 2004;43(3):170-72. Opie KM, Heenan PJ, Delaney TA, Rohr JB. Two cases of eosinophilic pustular folliculitis associated with parasitic infestations. Australas J Dermatol 2003;44(3):217-19….

Histologic Diagnosis of Inflammatory Skin Diseases

Rosacea

…ntical with those of idiopathic rosacea. Gram-negative “folliculitis” (infundibulitis) presents itself as pustules that develop in patients with acne vulgaris who have received systemic antibiotics for that condition over a long period of…