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A Clinical Atlas of 101 Common Skin Diseases

Nevus Sebaceus

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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…so-called aggressive digital papillary adenoma. Each of these neoplasms purported to be of eccrine character has a malignant counterpart. Are eccrine neoplasms really eccrine? Before beginning to answer that query, the issue of how adnexal epithelia…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…eral pathologists is the assumption that the origin of adnexal neoplasms can be determined by scrutiny of sections of tissue. The assumption is false. Histopathologists cannot judge the origin of adnexal neoplasms, i.e., whether they derive from foll…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Benign and Malignant Cells?

…based mostly on aspects of its silhouette. For example, benign neoplasms tend to be symmetrical, whereas malignant ones are asymmetrical. Benign neoplasms in the skin often “pop out” or “shell out,” whereas malignant neoplasms

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Basal-Cell Carcinoma Common in Nevus Sebaceus?

…fts tend to appear in the stroma, a finding expected in benign neoplasms, whereas in basal-cell carcinoma clefts occur between aggregations of neoplastic cells and adjacent altered stroma, a finding typical of malignant neoplasms. Trichoblastomas do…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Myxoma?

…sue, mucin is dominant in those benign and malignant cutaneous neoplasms said to be myxoid. In most of the neoplasms attended by enormous quantities of connective tissue mucin, however, elements epithelial actually predominate over the component myxo…

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