Evaluation of perihilar and central renal masses using the Chiba needle.

The Chiba needle was used to puncture 14 central renal masses believed to be cysts. Of these masses 13 were cysts and 1 was a peripelvic liposarcoma. Arteriography was not done before puncture. No complications occurred when these central masses surrounded by parenchyma or adjacent to hilar structures were punctured. Renal cyst puncture and cystography using the Chiba needle are safe methods for optimal diagnosis of central and peripelvic systs.