Introduction: Mesenchymal hamartoma of liver (MHL) is the second most common benign liver tumor in children. This tumor typically presents as a large benign cystic mass, solid or mix in children less than three years. Prenatally, it may grow quickly to an abnormal size that may lead to death or hydrops. Prenatal suspicion arises by increasing maternal serum α-FP or HCG and polyhydroamnious and can usually identify the case in the last trimester of pregnancy by ultrasound.