What is the most common malignant liver tumor in children three years old or younger?

• A. Hepatoblastoma
• B. Hepatocellular Carcinoma
• C. Metastatic Neuroblastoma
• D. Liver Cell Carcinoma

Answer: (A)

In children three years old or younger, the liver tumor most likely to be malignant is hepatoblastoma. This tumor arises in early liver development and is the most common primary malignant liver cancer seen in infancy and toddlerhood. It often presents as a palpable abdominal mass and may be associated with elevated alpha-fetoprotein levels, which helps distinguish it from other liver lesions.

Hepatocellular carcinoma, by contrast, is rarer in this age group and tends to occur in older children or those with chronic liver disease. Metastatic neuroblastoma can involve the liver secondarily, but it is not a primary liver tumor. Liver cell carcinoma is another name for hepatocellular carcinoma and is not typical in this very young population.