Malignant tumors of the wall of the chest, apart from metastatic carcinoma, are relatively rare. They are usually sarcomatous. Two hundred and thirteen cases were collected by Hedblom1 in 1921; of these, 61.4 per cent were sarcoma and 18.7 per cent chondroma. Few cases appear in the literature since that time, and in view of the great interest which is now maintained in thoracic surgery, it seems worth while to report two cases in which the patients have been under my care in the past two years.
The pathologic processes of these tumors does not differ from that of sarcoma or chondrosarcoma in other parts of the body. They may take their origin from the soft parts, the cartilage, ribs, sternum, clavicle or scapula. As the growth develops, it invades all of the structures of the wall of the chest and may finally attack the pleura. The two cases