Which pediatric liver tumor is the most common malignant?

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In children, the liver tumor landscape is different from adults, and the most common malignant liver tumor is hepatoblastoma. It typically presents in the first few years of life as a rapidly enlarging abdominal mass, and serum alpha-fetoprotein is usually markedly elevated, which helps distinguish it from other lesions and guides diagnosis. Imaging often shows a solid hepatic mass that can be multifocal and may have calcifications, with a risk of spreading to the lungs. Hepatoblastoma arises from immature liver precursor cells and is associated with conditions like Beckwith-Wiedemann syndrome or familial adenomatous polyposis, explaining why it’s the top pediatric malignant hepatic tumor. By contrast, hepatocellular carcinoma, angiosarcoma, and cholangiocarcinoma are far rarer in children and typically linked to chronic liver disease or other risk factors, making them less common than hepatoblastoma.