We have examined a total of 708 donor kidneys for vascular abnormalities. Twenty-two point seven per cent of these had arterial damage or anomalies and in 11 per cent venous abnormalities were found. Five hundred and fifty-one of these kidneys were transplanted in our centre. Excluding 38 recipients of living related donor grafts there was a slightly higher incidence of re-operation and urological complications amongst the recipients of kidneys which had either required bench-top arterial microvascular surgery for vessels damaged at donor nephrectomy or which had multiple vessels. However, the function and actuarial graft survival of such kidneys differed little from those of kidneys transplanted with a conventional single arterial anastomosis.