Search Results for: folliculo-sebaceous cyst

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Syringocystadenoma papilliferum Hidradenoma papilliferum 1. Not truly cystic (not a sac enclosed by epithelium) 1. Truly cystic (a sac enclosed completely or almost completely by epithelium) 2. Surface of skin papillated and hyperkeratotic 2. Surfa…

Histologic Diagnosis of Inflammatory Skin Diseases

Linear IgA dermatosis

…tholytic dyskeratotic acanthoma, the distinctive infundibular cyst named, curiously, “warty dyskeratoma,” and the type of squamous-cell carcinoma designated “pseudoglandular.” In sum, acantholytic cells are not, themselves, di…

Differential Diagnosis in Dermatopathology

Dermatofibroma vs. Dermatofibrosarcoma protuberans

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous inflammati…

Histologic Diagnosis of Inflammatory Skin Diseases

Darier’s disease and simulators of it

…er’s disease. Warty dyskeratoma, a type of infundibular cyst whose lining is characterized by changes throughout its circumference of acantholytic dyskeratosis, initially was called “isolated dyskeratosis follicularis,” implying a r…

Differential Diagnosis in Dermatopathology

Discussions

…holytic dyskeratotic acanthoma), and an uncommon infundibular cyst (warty dyskeratoma). Those findings histopathologic occur also as an incidental change confined to a single rete ridge or even an infundibulum of a biopsy specimen that was taken for…

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphocytoma cutis

…gstanding inflammatory response to rupture of an infundibular cyst. Dilantin may induce changes in the skin that vaguely resemble those of a lymphoma, but that happens rarely. The designation, “lymphocytoma cutis,” and synonyms for it, la…

Differential Diagnosis in Dermatopathology

Discussions

…times secondary to a ruptured infundibulum or an infundibular cyst. Therefore, the term dermatofibrosis describes the lesion more aptly, conveying as it does that the process is a type of fibrosing dermatitis, rather than a neoplasm of fibrocytes. Ma…