Search Results for: hamartoma

Differential Diagnosis in Dermatopathology

Syringocystadenoma papilliferum vs. Hidradenoma papilliferum

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Infundibulo-folliculo-sebaceous cystic hamartoma Steatocystoma 1. Situated mostly in the dermis as a rule; sometimes also the subcutaneous fat 1. Situated in either the dermis or the subcutaneous fat, or both together 2. Cyst does not “pop ou…

Differential Diagnosis in Dermatopathology

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Infundibulo-folliculo-sebaceous cystic hamartoma Steatocystoma…

Differential Diagnosis in Dermatopathology

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…d malignant neoplasms that may arise within nevus sebaceus, a hamartoma marked by alterations of the dermis, the epidermis, and the epithelial structures of adnexa, as well at times of the subcutaneous fat. Clinically, it is relatively easy to suspec…

Differential Diagnosis in Dermatopathology

Discussions

…ngle specimen. The large nodular type is seen commonly in the hamartoma, nevus sebaceus. Often, the large nodules are pigmented heavily by melanin as a consequence of the activity of dendritic melanocytes housed within aggregations of neoplastic tric…

Differential Diagnosis in Dermatopathology

Discussions

…is an inflammatory process, whereas a collagenous nevus is a hamartoma. A residuum of a once dense infiltrate of lymphocytes and plasma cells may be present even at a late stage of morphea. No inflammatory cells are seen, however, in a collagenous n…