Glomus_tumor Glomus tumor was also the name formerly used for a tumor now called a paraganglioma.A glomus tumor (also known as glomangioma, or nonchromaffin paraganglioma) is a rare benign neoplasm, is a specialized arteriovenous anastomosis usually found in the skin of the extremities. It arises from the glomus body, and was first described at Mount Sinai Hospital in New York City.