Undifferentiated Embryonal Sarcoma of the Liver

  • Etiology:
  • Imaging: Hemorrhage common
  • Imaging US: Not cystic
  • Imaging CT: Cystic
  • Imaging MR: Cystic
  • DDX:
  • Complications:
  • Treatment:
  • Clinical:
    — Normal AFP
    — Age peak 6-10 years

Radiology Cases of Undifferentiated Embryonal Sarcoma of the Liver

US and CT of undifferentiated embryonal sarcoma of the liver
Transverse US of the liver (above) shows a large heterogenous mass in the right lobe of the liver that is primarily hyperechoic in appearance, with multiple hypoechoic regions within it. Axial CT with contrast of the abdomen in the portal venous phase (below left) shows a large lesion in the right lobe of the liver with peripheral vascular enhancement. Coronal image in the delayed phase (below right) shows the mass to have a primarily necrotic center.
CT of pediatric undifferentiated embryonal sarcoma of the liver
Axial (above), coronal (below left) and sagittal (below right) CT with contrast of the abdomen show a huge, heterogenous, solid, low density mass filling much of the abdomen which does not have an obvious organ of origin.