in static scintigraphy with 99m tc-pertechnetate of primary lesions of the retroperitoneal space in children 4 types of scintigraphic pictures were singled out for differential diagnosis of wilms ' tumors , avascular benign lesions of the retroperitoneal space and neurogenic retroperitoneal tumors .
C0035359
retroperitoneal space
C0035358
retroperitoneal tumors