An Unusual Radiological Presentation of a Primary Hepatic Yolk Sac Tumor

A 39-year-old female presented with the right upper quadrant abdominal pain of 3 months duration. She did not have a fever or jaundice. The physical exam showed a palpable mass in the right hypochondrium measuring 6 cm in diameter. Laboratory findings showed serum total bilirubin level at 1 mg/dl (reference range: 0.1-1.0 mg/dl), serum glutamic oxaloacetic transaminase level at 100 IU (reference range: 0-35 IU/L), serum glutamic pyruvic transaminase level at 150 IU (reference range: 7-56 IU/L) and serum alkaline phosphatase level at 270 IU (reference range: 41 to 133 IU/L). Serum alpha-fetoprotein (AFP) was at 50 μg/L (reference range: 0-15 μg/L) and human chorionic gonadotropin (HCG) was negative. Computed tomography revealed a cystic lesion measuring 122 x 208 x 180 mm and occupying the right hepatic lobe. This mass was well limited and traversed by several septa (Figure 1).