Hepatic hemangioma

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[edit] Discussion

  • Most common primary liver tumor
  • Ranges from 0.4-20% of the population
  • Arise from the endothelial cells that line the blood vessels and consists of multiple, large vascular channels lined by a single layer of endothelial cells and supported by collagenous walls.
  • They are frequently asymptomatic and incidentally discovered at imaging, surgery, or autopsy.
  • They may be associated with focal nodular hyperplasia.
  • M:F = 1:5
  • Kasabach-Merritt syndrome: Hemolytic anemia and consumptive coagulopathy

[edit] Imaging Findings

[edit] US

  • Echogenic
  • Homogenous

[edit] CT

  • Noncontrast: Hypointense to liver
  • Portal venous enhancement: Peripheral nodular enhancement
  • Delayed enhancement: Lesion fills in the contrast

[edit] MRI

  • T2 hyperintense
  • Portal venous enhancement: Peripheral nodular enhancement
  • Delayed enhancement: Lesion fills in the contrast

[edit] Nucs

  • Tc99-labeled red blood cells show decreased activity on early dynamic images and increased activity on delayed images (i.e. 1-2 hours).
  • Only sensitive for larger lesions.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References