Preschooler with a right abdominal mass and elevated alpha fetal protein

CT and MRI of hepatoblastoma
Axial CT with contrast of the abdomen (above left) shows a large, inhomogenous multifocal mass on the right side of the abdomen that enhances less than the liver and that did not appear to arise from the right adrenal gland or right kidney. Axial T2 (above right) and axial (below left) and coronal (below right) T1 MRI with contrast of the abdomen show the mass arising from and involving nearly the entire liver and encasing the portal veins.

The diagnosis was hepatoblastoma.