Dermatology Practical & Conceptual

The dermatoscopic universe of basal cell carcinoma

Abstract Following the first descriptions of the dermatoscopic pattern of basal cell carcinoma (BCC) that go back to the very early years of dermatoscopy, the list of dermatoscopic criteria associated with BCC has been several times updated and rene…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reactive Perforating Collagenosis?

…e case for chondrodermatitis nodularis helices, picker’s nodules, surfer’s nodules, and nodules that form at the base of an amputation stump; the trauma in those conditions, however, results from something other than scratching. In short,…

Differential Diagnosis in Dermatopathology

Trichoblastoma, small nodular type vs. Trichoblastoma, large nodular type

A condition of persons of any age, but particularly children with a genetic proclivity for allergic rhinitis and conjunctivitis, and allergic asthma. Intense pruritus induces patients to rub the skin intensely and to scratch furiously, the resultant…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology


“Cutaneous fibroma Fibroma simplex Simple fibroma of the skin, as defined above, is a benign tumor, usually appearing solitary, on the upper part of the body and the extremities, which, mainly imbedded in the skin, is only rarely and little…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous Horn?

“Cutaneous horns may complicate solar keratoses, viral warts, seborrheic warts, squamous cell carcinomas, lichenoid keratoses, and basal cell carcinomas.” McKee PH. Tumors of the surface epithelium. In: Pathology of the Skin with Clinic…

Differential Diagnosis in Dermatopathology


Dermatofibroma, hemorrhagic papulo-nodule Kaposi’s sarcoma, hemorrhagic papulo-nodule