[Intrarenal localisation of renorenal collaterals in the dog. Observations on renal arteries as end-arteries (author's transl)].

One of the two main branches of the left renal artery was slowly occluded in four dogs. Repeated angiography was carried out from 45 to 61 days postoperatively; this made it possible to observe the development of collaterals between the normal and constricted branches of the renal artery, i.e. intrarenal renorenal collaterals. These collaterals developed predominantly from preexisting vessels of the extraglomerular system in the vicinity of the renal pelvis and calyces and, to a lesser extent, from medullary vessels and from forating capsular arteries.