Search Results for: hamartoma

Differential Diagnosis in Dermatopathology

Trichoadenoma vs. Microcystic adnexal carcinoma

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

Sebaceous hyperplasia vs. Nevus sebaceus of Jadassohn

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

Discussions

…tly to pose a dilemma diagnostic, even though the former is a hamartoma and the latter an adenocarcinoma. Both may have several findings histopathologic in common: presence of infundibular cyst-like structures scant stroma, epithelial components conn…

Differential Diagnosis in Dermatopathology

Discussions

…of the skin and the commonest neoplasm to develop within the hamartoma named badly nevus sebaceus (it is a hamartoma with abnormalities of many elements of the skin, not simply ones sebaceous). In actuality, squamous-cell carcinoma is a thousand tim…

Differential Diagnosis in Dermatopathology

Trichoblastoma, small nodular type vs. Trichoblastoma, large nodular type

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

Discussions

…s the name denotes, is a hyperplasia, whereas the latter is a hamartoma that involves not only sebaceous units, but other adnexal epithelial structures, the epidermis, the dermis, and the subcutaneous fat. The lesion tends to be alopecia. Lesions ste…

Differential Diagnosis in Dermatopathology

Study By Disease

…c-catagen type, ruptured (Quiz #65) Folliculo-apocrine cystic hamartoma (Quiz #74) Foreign body granulomatous dermatitis and panniculitis secondary to Artecoll (Quiz #603) Foreign body reaction to a “filler” (Matridex) (Quiz #335) Frostbi…