The epoch-making work of Rivas,1 reported in November, 1950, added to the armamentarium of radiologists and urologists a new diagnostic technique, which may be termed "presacral retroperitoneal pneumography."
In the past three years at French Hospital, we have used this method of outlining the perirenal spaces in many cases with complete satisfaction and no untoward effects. We should like to report on a case of renal displacement and rotation which occurred as a result of the retroperitoneal insufflation of oxygen. To our knowledge, this phenomenon has not been previously observed, and, since this finding may give rise to misinterpretation, we feel that it should be recorded.
REPORT OF A CASE
The patient, a 33-year-old housewife, was admitted to the Medical Service seven weeks after the normal, full-term, spontaneous delivery of an infant weighing 7 lb. 10 oz. (4592 gm.). Examination in the follow-up clinic revealed persistent hypertension, and she