Case 200: Focal Nodular Hyperplasia (FNH)
30 year old woman with incidentally found liver mass on CT of the abdomen and pelvis (not shown) done for crampy right lower quadrant abdominal pain.
US: Non-specific, large, in steatosis
Gray-scale US demonstrates a featureless hypoechoic mass in the background of hepatic steatosis. Color Doppler exam demonstrates no significantly increased internal vascularity.