Hepatoblastoma

Abstract

Hepatoblastoma is the most common primary liver cancer in children, with an incidence of approximately 1.5 cases per million children per year. Most cases are sporadic, typically presenting at a median age of 18 months, with only 5% occurring after 4 years of age. Clinical presentation often includes an abdominal mass and, less commonly, abdominal pain, weight loss, jaundice and precocious puberty. Low birth weight is a significant risk factor, along with genetic conditions such as Beckwith-Wiedemann syndrome, Simpson-Golabi-Behmel syndrome, familial adenomatous polyposis and trisomy 18. Screening protocols for hepatoblastoma are recommended for children with predisposing conditions. Medical imaging is crucial for hepatoblastoma diagnosis and staging, with abdominal ultrasonography being the initial modality of choice, followed by abdominal contrast MRI for detailed evaluation and monitoring. Chest computer tomography is indicated to evaluate potential lung metastases. The Pretreatment Extent of Disease (PRETEXT) system is employed for hepatoblastoma staging and for guiding treatment strategies such as surgical resection and chemotherapy. Patients with advanced hepatoblastoma may require liver transplantation. Advancements in surgery and chemotherapy have improved survival rates, with 5-year survival rates exceeding 80-90% in localized disease. However, challenges remain in treating individuals with high-risk and metastatic hepatoblastoma. Ongoing research into treatment stratification, the introduction of novel therapies, including targeted and immune therapies, and the application of otoprotectants are essential to address refractory or recurrent hepatoblastoma and to increase the overall survival of patients. Long-term quality of life and the management of treatment-related sequelae are becoming increasingly important as survival rates improve.