label: Ampulla of Vater Composite Gangliocytoma/Neuroma and Neuroendocrine Tumor
label_lc: ampulla of vater composite gangliocytoma/neuroma and neuroendocrine tumor
description: A neoplasm that arises from the ampulla of Vater and the periampullary region. It consists of a mixture of neuroendocrine cells, Schwann-like cells, and ganglion cells. It was formerly known as gangliocytic paraganglioma.