Renal scans initially show a reduction in excretion with cortical retention. This is the most common type of rejection. Most acute rejections will respond to immunosuppressive agents if diagnosed early. In contrast, the immediate non-function of graft can be caused by damage to the kidney during procurement and storage. Such problems are becoming less frequent. Obstruction, vascular compression, and ureteral compression are other causes of the neurotoxicities induction of a renal graft.