RENAL arteriovenous fistula is a rare complication of percutaneous renal biopsy, with only four cases previously reported. The purpose of the present communication is to draw attention to this complication and record a fifth case. Case Report The patient, a 29-year-old male, was first seen in the Outpatient Department of the Los Angeles County General Hospital on Feb. 19, 1961, with a stab wound of the neck. Blood pressure at that time was noted to be 200/120 mm Hg. A history was elicited of normotension while in the military service from 19S3 to 1956 and early in 1959, at the time of an insurance medical examination. The patient was first admitted to the Los Angeles County General Hospital on June 20, 1961, with shortness of breath, wheezing, and productive cough. He stated that he had been in good health until nine months prior to admission when he consulted his family doctor with complaints of dizziness, blurring vision, and mild occipital headaches. He was told that he had high blood pressure and was ...