Autonephrectomy is essentially an occluded renal tuberculosis, and although in our experimental work we have been dealing to a certain extent with pyogenic organisms, some German and French schools hold various views concerning the aspects of the pathologic conditions existing. Yet, one cannot find in the literature any case in which pyogenic organisms are the sole causative factor in the walling off of the kidney with the pelvis and the ureter so that these structures remain enclosed for any period of time. In reviewing the literature, Caulk,21in 1915, reported seven cases and read the most comprehensive paper on autonephrectomy presented in this country. Pardoe22reported twenty-one cases, and five cases presenting completely walled off lesions. Keys,23in a case of seventeen years' duration, showed a completely destroyed kidney at necropsy. Heitz-Boyer24reported a case of closed left kidney, and cited another case of a patient