Angiographic features of space occupying perirenal inflammatory lesions

The angiographic diagnosis of space occupying perirenal inflammatory lesions is described in 6 cases, 5 with operative confirmation of the diagnosis. The typical changes are noted most frequently in the capsular vascular complex. The combination of the typical changes in capsular arteries with little or no abnormality of the nephroangiogram points to the diagnosis of a capsular inflammatory lesion. The findings are described in 2 perirenal abscesses, in 2 casesz of infected hematoma (only 1 proven at operation), in a carbuncle of the capsule and in a caseating tuberculous granuloma involving the capsule. The differential diagnosis with other capsular and parenchymatous lesions is discussed.