Fig. 1
From: Collecting duct carcinoma with retroperitoneal mass as initial presentation: a rare case report
A. Contrast-enhanced CT shows a tuberculous retroperitoneal mass (red arrow) on the left side of the kidney. B. 3 months later, at the first abdominal CT review, a mass about 2.5 cm in size was found occupying the left hilum (red arrow). C. 5 months later, the second abdominal CT review revealed a large and small 3.6 cm soft tissue mass under the left kidney (red arrow) and multiple soft tissue shadows in the renal portal area (blue arrow)