A 68-year-old Japanese male (Case 1) and a 59-year-old Japanese male immigrant to Brazil (Case 2) who suffered from subcutaneous eosinophilic lymphoid granuloma (Kimura's disease) of several years duration, developed nephrotic syndrome. Renal biopsy demonstrated membranous nephropathy in Case 1 and minimal-change lesion in Case 2. Both patients were treated with prednisolone for several months. There was complete remission of nephrotic syndrome in eight years in Case 1 and in three months in Case 2. Proteinuria did not reappear after remission of nephrotic syndrome in either case. In contrast subcutaneous tumors subsided in both cases during steroid treatment but again became active immediately following discontinuation of the drug. These clinical observations suggest that, though some common factor(s) might mediate the development of both skin and renal lesions, the mechanism of action on these two target organs may differ, perhaps serving only as a "trigger" for the initiating mechanism of renal disease.