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Table 2. Diagnostic Differences Between Undifferentiated Embryonal Sarcoma of the Liver and Biliary Tract Rhabdomyosarcomaa

 Undifferentiated Embryonal Sarcoma of the Liver Biliary Tract Rhabdomyosarcoma 
aAdapted from Nicol et al.[60]
Age at DiagnosisMedian age 10.5 yMedian age 3.4 y
Tumor LocationOften arises in the right lobe of the liverOften arises in the hilum of the liver
Biliary ObstructionUnusualFrequently; jaundice is a common presenting symptom
TreatmentSurgery and chemotherapySurgery (usually biopsy only), radiation therapy, and chemotherapy


  1. Nicol K, Savell V, Moore J, et al.: Distinguishing undifferentiated embryonal sarcoma of the liver from biliary tract rhabdomyosarcoma: a Children's Oncology Group study. Pediatr Dev Pathol 10 (2): 89-97, 2007 Mar-Apr.  [PUBMED Abstract]