Hanzala Zahid

1 Introduction Undifferentiated embryonal sarcoma of the liver (UESL) is a rare yet aggressive pediatric hepatic tumor, first described by Stocker and Ishak in 1978 [1]. It primarily affects children aged 6–10 years, although adolescent and adult cases have been documented [2, 3]. UESL accounts for approximately 9%–15% of pediatric liver malignancies [1]. Clinically, UESL often presents with vague abdominal symptoms such as pain or a palpable mass, delaying diagnosis [4].