Fig. 1From: IgG4-related inflammatory pseudotumor of the renal pelvis involving renal parenchyma, mimicking malignancy(a) CT scan show 5-cm-wide mass lesion located at the right renal pelvis (arrow). (b) Gross examination of the resected specimen showing relatively well circumscribed whitish firm mass. The mass lesion is mainly located at the renal pelvis and blocking the ureter pathway as the ureter is seen in the right side of the mass lesion (arrow). Also renal parenchyma adjacent to the mass lesion seems to be involvedBack to article page