Dermatology Practical & Conceptual

The order of things and the classification of melanoma

Editorial Melanoma is a fascinating disease. It appears in a myriad of forms. No two melanomas look alike; every melanoma is unique morphologically. Like other biologic phenomena it is highly complex and diverse in its forms of appearance. Scientist…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reactive Perforating Collagenosis?

…accompanied by maddening pruritus, which in turn provokes wild scratching. Clinically, those lesions often resemble “neurotic excoriation” and picker’s nodule (which is a result of both rubbing and scratching). The primary process i…

Differential Diagnosis in Dermatopathology

Discussions

Pruritic urticarial papules and plaques of pregnancy (PUPPP) and a superficial response to an assault by an arthropod are inflammatory diseases that share many features clinical and findings histopathologic. When viewed through a conventional micros…

Differential Diagnosis in Dermatopathology

Urticarial reaction to an arthropod assault vs. Urtica

A papular and pustular inflammatory process that is centered in follicles and is distributed mostly in the middle third of the face in both vertical and horizontal directions. Among the varied manifestations of rosacea are innumerable telangiectases…

Differential Diagnosis in Dermatopathology

Discussions

In an urticarial reaction to an assault by an arthropod and in lesions of true urtica, the infiltrate of inflammatory cells is mixed, contains at least lymphocytes and usually eosinophils, and is accompanied by extravasated erythrocytes and edema of…