Objective To investigate the clinical and ultrasonographic features of mesenchymal hamartoma of liver（MHL）.Methods This study retrospectively analyzed the clinical features and ultrasonographic characteristics of 7 patients of MHL

whose diagnosis were confirmed by surgery or liver biopsy.Results In 7 patients of MHL

3 cases of male

4 cases of female

with the age range from 8 months to 24 years.All patients had single lesion

6 cases located in the right lobe

1 case located in the left lobe.The diameter of the lesions were 12～16 cm.Septa-cystic（2 cases）

solid-cystic（4 cases） and echogenic（1 case） lesions were shown by sonography

the border and shape of the lesions were clearly defined in all cases.CDFI showed none blood flow signal in septa cystic lesions

whereas the solid part of the solid-cystic lesions and echogenic lesion showed line blood flow signal.Conclusion The age of onset for MHL seems less than 2 years.Most MHL are single large lesions in the right lobe of liver

ultrasound shows a septa-cystic or solid-cystic lesion with clear border and regular shape.