Dermatology Practical & Conceptual

Review of Atlas of Vulvar Pathology. 3rd ed. by EJ Wilkinson, IK Stone

…categories, a chapter being devoted to each successively: (1) Cysts; (2) Maculae; (3) Papillae; (4) Papules; (5) Plaques; (6) Tumors, benign; (7) Ulcers; (8) Verrucae; (9) Vesicles/bullae; (10) Pediatrics; (11) Trauma; (12) Tumors, malignant; and (13…

Differential Diagnosis in Dermatopathology

Discussions

…; is the sine qua non for establishing the apocrine nature of cysts, hamartomas, and neoplasms. Only exceedingly rarely do syringocystadenoma papilliferum and hidradenoma papilliferum eventuate in apocrine carcinoma. A few words should be written abo…

Differential Diagnosis in Dermatopathology

"Pseudolymphoma," B-cell type vs. Malignant lymphoma, B-cell type

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

…icians misinterpret both apocrine and eccrine mixed tumors as cysts and incise the lesions rather than attempt to excise them, a maneuver that often results in an artifactual cleft being introduced into the upper part of the neoplasm as it appears in…

Differential Diagnosis in Dermatopathology

Sebaceous hyperplasia vs. Nevus sebaceus of Jadassohn

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…

Dermatology Practical & Conceptual

An atypical pigmented lesion

…middle surrounded by small nests in which multiple keratinic cysts can be identified (red arrows). Some of them are locus of dystrophic calcification (green arrows). The neoplasia is composed of basaloid cells with mild cytology without acceptable m…

Differential Diagnosis in Dermatopathology

Epidermolytic hyperkeratosis vs. Plane wart

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…

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma annulare

…uloma annulare and neutrophils in the example of infundibular cysts that have ruptured. Parenthetically, authentic elastic fibers also may be phagocytized by mechanisms similar to the one just proposed, as in inflammatory diseases like granuloma annu…

Differential Diagnosis in Dermatopathology

Discussions

…e, or follicular differentiation, and follicular and apocrine cysts and cystic hamartomas. It used to be a matter of faith that the neoplasm most common in nevus sebaceus is basal-cell carcinoma. It turns out that the majority of those are really tri…

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

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…