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Fig. 2 | World Journal of Surgical Oncology

Fig. 2

From: The diagnostic utility of retroperitoneoscopic tissue biopsy for unresectable retroperitoneal lesions excluding urogenital cancers

Fig. 2

Two cases experiencing retroperitoneal urine leakage after retroperitoneoscopic tissue biopsy. a Case 1. Contrast enhanced CT scan of a 67-year-old man demonstrates extra-urinary lesions of the right ureter (yellow arrow), which results in ureteral obstruction and hydronephrosis. The CT scan on postoperative day (POD) 20 shows an infectious fluid storage in the retroperitoneal cavity (red arrows). Ureteral injury at the biopsy site is detected by the transurethral retrograde ureterography (red arrowhead). b Case 2. Contrast-enhanced CT scan of a 64-year-old man demonstrates retroperitoneal lesions involving aorta, inferior vena cava, common ileac arteries, and left psoas (yellow arrows). The left ureter is located close to the lesion (yellow dashed line and arrowhead). The CT scan on POD 17 shows a cystic urinoma in the retroperitoneal cavity (red arrows). The red arrowhead indicates the ureter with a ureteral stent

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