Clinical Case Studies

Rhinophyma with Basal Cell Carcinoma

…right nasal dorsum. (Figure 1) The patient had long-standing acne rosacea and had been treated with topical metronidazole for 7 years followed by azelaic acid gel for 2 years prior to presentation. He had noticed increasing prominence of the nodule…

Histologic Diagnosis of Inflammatory Skin Diseases

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…an infundibular cyst What is known, conventionally, as cystic acne represents rupture of an infundibular cyst with development, sequentially, of suppurative, granulomatous, and fibrosing inflammation in response to contents of the cyst that were prop…

Differential Diagnosis in Dermatopathology

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Acne vulgaris, erythematous papule Rosacea, erythematous papule…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Acne vulgaris, erythematous papule Rosacea, erythematous papule 1. Only one follicle involved usually in a 4 mm biopsy specimen 1. Nearly all follicles involved usually in a 4 mm biopsy specimen 2. Suppurative infundibulitis prominent 2. Suppu…