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CT scans of (A) lipid-poor angiomyolipoma in a 29-year-old man in the right upper pole of kidney. (B) The CT attenuation value on the non-enhanced scan was 42 HU. (C) The enhancement value was 103 HU at 30 sec on enhancement CT scan, and (D) 99 HU at 90 sec. (E) At 5 min on the enhancement CT scan, the CT attenuation value was 66 HU. The wash-in and washout values are 61 HU and 37 HU respectively. CT, computed tomography; HU, Hounsfield units.
