Dermatology Practical & Conceptual

Enlarging plaque on the face with enlarged supraorbital nerve

Case report A 38-year-old Nigerian man, who had been living in Italy since 2008, presented with an annular lesion on the right temporal and frontal region that appeared two months prior to his visit. He reported a slow centrifugal enlargement of the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

“At the dermatology meeting in Berlin, Jadassohn also indicated that changes in the cartilage can often be established clinically, especially the knobby sites on the helix that show a whitish transparence through a thinned epidermis. My expe…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

ABSCESS [L. abscessus (a going away)]: Clinically, a circumscribed collection of pus and histopathologically a localized collection of neutrophils. An abscess may form in the epidermis, both surface and infundibular, eccrine ducts, dermis, and subcu…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

Error: Abortive is an accurate modifier of particular pathologic processes, e.g., abortive dermatofibroma, abortive morphea, and abortive T-cell lymphoma. Reason: The idea itself is abortive! For example, what is called “abortive T-cell lympho…

Dermatology Practical & Conceptual

Acral melanoma with hyperkeratosis mimicking a pigmented wart

Abstract Acral lentiginous melanoma (ALM) of the sole sometimes has a hyperkeratotic appearance and mimics a pigmented wart. We report a case of an 81-year-old woman with an ALM on the left sole with hyperkeratosis. Due to its presentation it was di…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Mucha-Habermann Disease a Lymphocytic Vasculitis?

“The basic and essential histopathologic change in pityriasis lichenoides et varioliformis acuta is a vasculitis, differing from pityriasis lichenoides chronica, which is primarily a disease of the epidermis…Very important and never des…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Palpable Purpura?

“Because the small vessels—especially the capillaries—are involved, exudation and hemorrhage are the prominent clinical features of leukocytoclastic angiitis. Purpura is almost always present in the cutaneous lesions and is freque…