A case of sebaceoma with extensive apocrine differentiation.

Apocrine differentiation is a rare event in sebaceoma, and only 3 cases have been reported. We report a case of sebaceoma with extensive apocrine differentiation on the scalp in a 73-year-old Japanese woman. The resected tumor was located entirely within the dermis and subcutis as a well-circumscribed, lobulated, solid, and partially cystic mass, measuring 35 mm at the largest diameter.

A case of cutaneous myoepithelial carcinoma.

Background: Cutaneous myoepithelioma, both benign and malignant, is a rare neoplasm composed of neoplastic myoepithelial cells showing diverse histopathological features, and criteria for discriminating benign or malignant have not been fully clarified.

Patient: We present a case of cutaneous myoepithelial carcinoma in a 62-year-old woman presenting a solid mass in the right back.

Results: Resected tumor was located in the whole dermis and subcutis.

Carcinosarcoma ex recurrent pleomorphic adenoma of the submandibular gland.

We report a case of carcinosarcoma ex recurrent pleomorphic adenoma in the submandibular region of a 56-year-old Japanese man. He presented with a 2-year history of a rapidly growing mass in the submandibular region. He reported undergoing excision of a nodule in the same region 10 years earlier.