Malignant Anterior Tongue Neoplasm

A primary or metastatic malignant neoplasm that affects the anal canal or perianal skin. Representative examples include carcinomas, lymphomas, and…

A primary or metastatic malignant neoplasm involving the ampulla of Vater.

A malignant hemangiopericytoma arising from the brain or meninges and occurring in the adult population.

A malignant hemangiopericytoma occurring in the adult population.

A primary or metastatic malignant neoplasm affecting the adrenal medulla.

A pheochromocytoma that metastasizes to other anatomic sites. Common sites of metastasis include lymph nodes, bones, liver, and lung. Morphologic…