TUMOR OF THE ORBIT IN A CASE OF OSTEOCHONDROFIBROSARCOMATOSIS

Primary sarcomas occur with great frequency among tumors of the orbit. Birch-Hirschfeld¹ collected the reports of 1,566 cases of orbital tumors, 710 of which were sarcomas. By far the greater number of these were the round cell types and fibrosarcomas. Instances of chondrosarcoma,² myxochondrosarcoma³ and myosarcoma⁴ are reported, but they are rare. According to Peters,⁵ osteosarcomas occur much more often than tumors containing cartilage or muscle. Sarcomas of metastatic orgin are rare. Those in the reported cases were found to have their primary source, respectively, in the mediastinum,⁶ the retroperitoneal tissuse,⁷ the lung,⁸ the intestine,⁹ and the femur.¹⁰ The last mentioned case is the only instance in which the primary tumor affected osseous tissue. Rollet and Colrat¹¹ described several instances of metastases in the orbit from sarcomas of the suprarenal gland, in one of which the