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Fig. 1C. —53-year-old man with hypervascular renal clear cell carcinoma of upper pole of right kidney. Note small simple renal cyst (black arrow). Gradient-echo FLASH T1-weighted MR images at same level as A show early heterogeneous enhancement of lesion (white arrow) at 30 sec (B), lesion (white arrow) enhancement increasing at 90 sec (C), and lesion (white arrow) enhancement greater than that of renal cortex at 120 sec (D) after gadolinium injection.