What is hamartoma?

DEFINITION A benign focal lesion of the liver that consists of normal tissue that has differentiated in an abnormal fashion; are multiple subtypes, depending on the types of cells involved (e.g., bile duct hamartoma, mesenchymal hamartoma, etc.). INCIDENCE Very Rare. SIGNS AND SYMPTOMS Typically asymptomatic; can present with RUQ pain or fullness. DIAGNOSIS Usually discovered incidentally during radiologic imaging; may require histopathologic evaluation. TREATMENT Surgical excision