[The angiographic evaluation of the collateral circulation in an inoperable kidney tumor after embolization].

Collateral circulation in renal tumor was measured at control angiography 2-22 months after therapeutic embolisation in 32 patients with inoperable cancer of the kidney. Collateral circulation was absent in 38% of patients. 20 patients (62%) had 36 collaterals. The essential role in the reestablishment of arterial supply to the tumor belonged to collaterals from the lumbar, adrenal, accessory arteries as well as to recanalization of the main renal artery trunk. Embolization of the collaterals was performed in 18 patients. It is inferred that after therapeutic embolisation of the renal artery the majority of the patients develop collateral supply of the tumor. Embolisation of the collaterals can be performed 6-12 months after the embolization at control investigation. For detailed evaluation of the tumor revascularization an additional angiographic examination at that time would be beneficial.