On April 19, 1935, I successfully performed a one stage interpelviabdominal amputation for an osteochondroma of the pelvis on a man 24 years of age. At the time of writing he is still alive and active. While I had performed interscapulothoracic amputation a number of times and had disarticulated the hip several times in the past few years, I had never had the opportunity before to perform this extremely mutilating operation, and I was somewhat at a loss as to the correct procedure. I had read about the operation as reported by Keen,1 Pringle2 and Judin,3 but otherwise I was in the same stage of uncertainty as the French surgeon, Leriche,4 who recently stated that when the occasion arose to perform this major operation, he was unfamiliar with the operation, had never done it and had never seen it done. He might also have added that