This study embodies a clinical résumé of ninety-five cases of renal carcinoma (table 1). Thirty-one (32.63 per cent) of this number were studied at necropsy. In seventeen (17.89 per cent) of these the condition was discovered as a chance observation; ten patients (10.43 per cent) died after irradiation and four (6.31 per cent) postoperatively. Fifty-three (55.78 per cent) had a nephrectomy, four (4.21 per cent) a nephroureterectomy and one (1.05 per cent) a biopsy of a supposedly retroperitoneal mass which was in fact a renal neoplasm with extensive local metastasis. Seventeen (29.82 per cent) are living and with the exception of four (7.01 per cent) are in good health. Thirty-six (63.15 per cent) are dead; this number includes six (10.52 per cent) who died postoperatively. The remaining thirty (31.57 per cent) lived from less than one year to ten years and five months. Four (7.01 per cent) patients were not