THE MOST comprehensive review of the literature on benign tumors of the common bile duct was written by Chu1 in 1950. In this review he lists 24 papillomas and polyps, 18 adenomas, 3 fibromas, 3 neuromas, 2 granulomas, 1 melanoma, and 1 carcinoid. To this list we should like to add the report of a case of leiomyoma of the interior pancreatic portion of the common bile duct. We have been unable to find any previous reviews dealing with benign or malignant neoplasms of the muscular wall of the choledochus. REPORT OF CASE History. —The patient, a 31-year-old woman, was admitted to Providence Hospital, Detroit, on March 2, 1950, with a history of episodes of nausea and vomiting and itching of one year's duration. Jaundice, which had not been too pronounced because of the patient's swarthy complexion, had become increasingly more marked. Itching was very troublesome. The patient stated