Vol. 42 (2): 392-394, March – April, 2016
Chromophobe renal cell carcinoma mimicking cortical invasion by synchronous invasive urothelial carcinoma of the intra-renal collecting system on ct urography
Ryan Yu 1, Gabriella Gohla 1, 2, Ehsan A. Haider 2, 3
1 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; 2 St. Joseph`s Hospital, Hamilton, Ontario, Canada; 3 Department of Diagnostic Imaging, McMaster University, St. Joseph’s Hospital, Hamilton, Ontario, Canada
An 83-year-old man presented to hospital with gross hematuria. His medical history was remarkable for remote open left pyelolithotomy, chronic inflammatory demyelinating peripheral neuropathy, benign prostatic hyperplasia, and cerebrovascular accident for which he took aspirin-dipyridamole. Urine cytology was negative for malignant cells. Renal ultrasound showed a lobulated, hypoechoic lesion centered in an echogenic hilum of the upper pole of the left kidney. Preoperative CT urogram showed a large, round, heterogeneously-enhancing soft tissue filling defect, measuring 3.6cmx4.0cmx3.3cm, casting the major calyx of the upper pole of the left kidney (Figure-1). It showed definitive heterogeneous enhancement after contrast administration. On the delayed urographic phase, contrast was noted outlining the filling defect.