Smooth-muscle tumors of the colon. Report of a case involving the cecum and ascending colon.

IN 1863 Virchow reported a case of gastric smooth-muscle tumor. In 1923 Scott 1 operated on the first patient in the United States. The pathological diagnosis was leiomyoma malignum. Baker and Good 2 defined these tumors as smooth-muscle tumors of the alimentary tract and include both benign leiomyoma and malignant leiomyosarcoma. Incidence These large-bowel tumors comprise about 1% of all gastrointestinal tumors. The incidence of tumors of the colon in various authors' reports were as follows: MacKenzie et al, 3 nine of 269; Ripstein and Flint, 4 one half of 1% of 202; Golden and Stout, 5 eight of 60. A 4-week-old infant was the youngest patient having involvement of the colon in a case reported by Kriss. 6 The oldest patient was 81 years of age. Meszaros 7 saw six out of 13 patients below 27 years of age. Bockus 8 reported 37 large-bowel, smooth-muscle tumors, 24 of which were