RT Journal A1 Hirsch RL T1 CHronic renal insufficiency JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1999 FD April 12 VO 159 IS 7 SP 757 OP 757 DO UL http://dx.doi.org/ AB I enjoyed the review of chronic renal insufficiency by Rahman and Smith,1 but found the omission of one cause of renal insufficiency to be disheartening. Herein I describe a case of nephropathy whose cause was only discovered only after the physician was guided by a subtle laboratory finding to question the patient carefully about her medical and social history.