Search Results for: cysts

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…

Differential Diagnosis in Dermatopathology

Discussions

…nevoid follicular epidermolytic hyperkeratosis), infundibular cysts, benign solitary keratoses (epidermolytic acanthomas), and solar keratoses, and as an incidental finding in tiny foci within the epidermis of various inflammatory diseases and benign…

Differential Diagnosis in Dermatopathology

Discussions

…Those lesions have been reputed to follow trauma, rupture of cysts, insect “bites,” vaccinations, and hyposensitization injections, although in most instances the cause of pseudolymphomas in general remain obscure. Clinically, “Pse…