To the Editor: Macrohematuria or microhematuria occurs frequently as a result of the treatment of biliary stone disease by extracorporeal shock-wave lithotripsy.1,2 This effect has been attributed to the inclusion of the right kidney in the path of the shock waves.3 Although evidence of renal trauma has been detected by magnetic resonance imaging4,5 or CT6,7 in nearly all patients undergoing lithotripsy for renal stone disease, we are not aware of any radiographic documentation of right renal trauma after biliary lithotripsy. Recently, an 84-year-old man received 2000 shocks to a stone in the common bile duct during an investigational study of. No extract is available for articles shorter than 400 words. © 1989, Massachusetts Medical Society. All rights reserved.