抄録
The case of a woman in her 40s with a renal arteriovenous malformation (AVM) is described. Renal angiography showed an aneurysmal-type AVM with feeding artery stenosis and multiple tortuous vessels that resembled cirsoid-type renal AVMs. These tortuous vessels were connected to the feeding artery of the aneurysmal-type AVM, indicating that they were not true cirsoid-type AVMs, but collateral vessels that developed secondary to the feeder stenosis.
Coil embolization of the shunt and percutaneous transluminal angioplasty (PTA) for the stenosis were performed. Following embolization and PTA, the tortuous vessels disappeared.
In conclusion, collateral formation was likely induced by pressure gradients caused by the aneurysmal-type AVM and proximal arterial stenosis.
