Which of the following is the most common liver tumor of childhood?

b. Hepatoblastoma

Primary liver tumors are uncommon in children. Of these, about one-third are benign and two-thirds are malignant. The most common presenting feature for a liver tumor is an asymptomatic abdominal mass. The diagnostic evaluation is generally an ultrasound initially followed by either computed tomography or magnetic resonance imaging, for definitive diagnosis. The relative incidence of liver tumors is illustrated in the table below.

Hepatoblastoma is the most common liver tumor of childhood. Most hepatoblastomas are discovered within the first two years of life. Although these are large and may require primary chemotherapy, a 65%–75% survival is achievable with resection that yields histologically clear resection margins.