Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Clinical Case Studies

Rhinophyma with Basal Cell Carcinoma

…phology. A review of the literature reveals 15 to 30% rates of carcinoma in the setting of rhinophyma.1-2 HISTOLOGY A cutaneous shave biopsy of the right nasal dorsum lesion was performed and was consistent with occult basal cell carcinoma in a setti…

A Clinical Atlas of 101 Common Skin Diseases

Mammary Paget’s

Mammary Paget’s disease is an apocrine carcinoma that begins in mammary glands and extends along lactiferous ducts to the epidermis where it is seen clinically as a scaly, crusted, or eroded plaque on the nipple or areola of women mostly, and…

A Clinical Atlas of 101 Common Skin Diseases

Extramammary Paget’s Disease and Mammary Paget’s Disease

Extramammary Paget’s disease is an apocrine carcinoma that begins within the epidermis and presents itself clinically as a patch or a subtle plaque that extends centrifugally for many years before becoming a readily discernible thick plaque, a…

Therapeutic Strategies in Dermatology

Lichen Planus: Key Points

…of the skin, may be complicated by the development of squamous cell carcinoma. Lichen planus may be triggered by or found in association with exogenous factors, such as medications or contact allergens; a treatable cause should always be sought. Near…

Therapeutic Strategies in Dermatology

Erythema Annulare Centrifugum: Overview

…ent is otherwise supportive. Gyrate erythemas are divided into superficial and deep types, the superficial types having the classic annular morphology and the “trailing” scale. The deep type are usually “urticarial” lesions, w…