Multiple endocrine neoplasia type 1 (MEN 1) is a disorder that causes the development of tumors in the stomach, endocrine glands, and parts of the small intestine. When tumors develop in the ...

The proband attended the Mayo Clinic in 1960, when a diagnosis of ulcerogenic islet-cell tumor was made, and familial multiple endocrine ... to have evidence of 1 or more endocrine tumors; 6 ...