Resolving Quandaries in Dermatology, Pathology & Dermatopathology

-oid?

…id sarcoma” verges on oxymoron. Carcinomas are malignant neoplasms of epithelial cells; sarcomas are malignant neoplasms of nonepithelial cells. The sarcoma that Enzinger designated epithelioid was thought by him to resemble certain inflammator…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Precursor Lesions of Melanoma?

“Precursors of melanoma are lesions that are benign per se but have the potential of turning malignant and thus giving rise to melanoma. Two such entities are recognized: (1) atypical nevomelanocytic proliferation, and (2) congenital nevomela…

Differential Diagnosis in Dermatopathology

Discussions

Apocrine and eccrine hidradenomas have numerous findings histopathologic in common. Their silhouette is that of a benign neoplasm, characterized as it is by symmetry, sharp circumscription, smooth borders, compressed fibrous tissue at the peripherie…

Dermatology Practical & Conceptual

When all you have is a dermatoscope—start looking at the nails

Abstract Pigmented and non-pigmented nail alterations are a frequent challenge for dermatologists. A profound knowledge of clinical and dermatoscopic features of nail disorders is crucial because a range of differential diagnoses and even potentiall…

Differential Diagnosis in Dermatopathology

Discussions

The neoplasms under discussion here are termed “mixed tumors” because they consist of a combination of epithelial elements with tubular differentiation on one hand and non-epithelial elements with mucinous and chondroid aspects, but they…

Differential Diagnosis in Dermatopathology

Metastatic carcinoma from a breast vs. Morpheiform 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…

Differential Diagnosis in Dermatopathology

Discussions

Syringocystadenoma papilliferum and hidradenoma papilliferum are both apocrine papillated cystadenomas. Clinically, syringocystadenoma papilliferum appears at birth or in early childhood as a crusted, often weeping, verrucous plaque, usually on the…

Differential Diagnosis in Dermatopathology

Lecture Series

The free Adobe Flash Player is required to view these videos. Lecture Series: A series of lectures by A. Bernard Ackerman, MD on subjects from A Clinical Atlas of 101 Common Skin Diseases. Read Introduction A series of lectures by A. Bernard Ackerma…