In situ and ex situ renal artery aneurysmectomy in the solitary kidneys.

We report 2 cases of renal artery aneurysms in congenital solitary kidneys, which were treated respectively by in situ and ex situ aneurysmectomy. Hyperosmolar intracellular electrolyte solution was valid in preserving renal function during renal ischemia in both cases. The occurrence of an aneurysm in a solitary kidney, ex situ operation and renal preservation during ischemia are discussed.