TWO HUNDRED twenty-two cases of malignant tumor of skeletal muscle origin have been reported in the literature.* Of these, only five were rhabdomyosarcoma of the chest wall, and nine were grouped as involving the abdomen, back, or chest wall. The patient reported on here represents an additional case of rhabdomyosarcoma of the thoracic wall.
C. F. C. (Boston VAH, Reg. No. 2747), a 65-year-old white male office worker, was admitted Oct. 6, 1952, with a chief complaint of a mass of the left thoracic back of five months' duration. Fleeting soreness first called his attention to the area. A mass appeared shortly afterward which had not been noted to change in size. There was some soreness of the area after prolonged sitting but no radiating pain or interference with motion. He had lost 8 lb. (3.6 kg.) in the five-month period.
The patient had had no serious illness, and the