A 43-year-old man with no significant medical history had a 3-month history of right upper quadrant pain with no associated gastrointestinal or urinary symptoms. On examination, he appeared well and was in no distress. His abdomen was not tender, but had a palpable right upper quadrant fullness. A computed tomographic (CT) scan revealed a 7.9-cm, bilobed, fat-containing mass adjacent to the upper pole of the right kidney (Figure 1). A magnetic resonance image (MRI) was performed to better assess its continuity with adjacent organ structures. It showed no hepatic or renal invasion (Figure 2).