Primary hepatic B-cell lymphoma in a child.

Lymphoma arising in the liver is uncommon in adults and rare in children. A 12-year-old boy with hepatomegaly and jaundice had a calcified intrahepatic large-cell lymphoma of B-cell origin that expressed bcl-2 protein and had near-tetraploid chromosome number with a t(8;14) (q24;q32) and a homogeneously staining region (HSR). This tumor, only the fourth example of primary hepatic lymphoma in a child, has the rare finding of an HSR before treatment and is the first human lymphoma with t(8;14) that expresses bcl-2 protein. In addition, the demonstration of extensive calcification in the tumor by computed tomography scan is highly unusual for lymphoma. Lymphoma must be considered in the differential diagnosis of primary liver tumors in children and adults, especially if the serum alpha-fetoprotein level is normal.