Retroperitoneal Fatty Tumors

FIFTY-TWO cases of benign and malignant fatty tumors of the retroperitoneal space were reported in the literature from 1937 to 1947.1The present case report makes this total 53. Von Wahlendorf.2collected 165 of such cases up to 1921. From 1921 to 1937, after all repetitions were deducted, it was estimated that 76 cases had been reported.3Therefore a total of approximately 300 cases have been reported up to the present time (table 1). Moreland and McNamara1mfound 3 retroperitoneal liposarcomas among 16,000 tumors of all kinds. Donnelly10collected 95 cases of primary retroperitoneal tumors at the University of Iowa Hospital during a period of twenty years. Two of these were fatty tumors, 1 of which was malignant. Stromme and Stander1sat the New York Hospital found 12 retroperitoneal tumors in 13,113 gynecologic operations. One was a retroperitoneal lipoma. These tumors are of particular