Mesenchymal hamartoma of the liver

A 4-year-old girl was diagnosed with cystic mesenchymal hamartoma, a rare benign tumor of the pediatric liver. Initial imaging studies and subsequent anatomopathological examination confirmed the diagnosis. Clinical findings included an abdominal mass detected since age 1, progressive hepatomegaly, and normal systemic health without signs of cholestasis. Surgical resection was successful, with no postoperative complications observed at the 1-year follow-up. This case highlights the importance of considering cystic mesenchymal hamartoma in pediatric liver tumor diagnoses, particularly in cases with characteristic imaging features and absence of cholestasis.