Report of seven children with undifferentiated embryonal sarcoma of the liver

Undifferentiated embryonal sarcoma of the liver (UESL) very rarely presents clinically.Approximately 1% to 4% of all solid tumors in children are malignant liver tumors,and UESL accounts for 9% to 15% of the liver tumor.The onset of UESL usually occurs at 6 to 10 years of age and there is no obvious difference based on sex.[1] The first symptoms of UESL are abdominal distention and abdominal pain without jaundice,while a physical examination commonly reveals no positive vital signs except the palpable liver tumor.[1] The serum alphafetoprotein (AFP) test is not sensitive for UESL.[2] Preoperative diagnosis of UESL is very difficult.