Multiple endocrine neoplasia, type IIB (MEN IIB)

Multiple endocrine neoplasia, type IIB (MEN IIB)

Pheochromocytoma can occur in the inherited syndrome multiple endocrine neoplasia, type 2B (MEN 2B). In addition to having pheochromocytoma, people with MEN 2B have medullary thyroid cancer and tumors of nerves in the lips, mouth, eyes and digestive tract.