Dermatology Practical & Conceptual

When all you have is a dermatoscope‚ÄĒstart looking at the nails

…to invasive melanocytes of the melanoma) and several keratin cysts of the adjacent skin (corresponding to areas of keratinization of the squamous cell carcinoma) (Figure 14A, B). Figure 14. Squamomelanocytic tumor of the nail unit as a genuine co…

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

…solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve without residua or with scars of different types, e.g., keloidal or atrophic, including cri…

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

…solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve without residua or with scars of different types, e.g., keloidal or atrophic, including cri…

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

…solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve without residua or with scars of different types, e.g., keloidal or atrophic, including cri…

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…