Friday, October 26, 2012

Benign Neoplasms of the Spleen

  1. Splenic cysts
    • true cyst - has endothelial lining
      • epidermoid
      • parasitic
    • pseudocyst - lacks endothelial  lining 
      • post traumatic - most common
    • both are well defined masses, attentuation similar to water on CT, do not enhance with contrast administration, high signal on T2WI
  2. Hemangioma
    • most common benign neoplasm
    • US: small cystic masses, may show flow on color Doppler
    • CT: hypodense on NCECT, post contrast images show early centripetal nodular enhancement with delayed uniform enhancement
    • MR: hypointense on T1WI, hyperintense on T2WI
    • diffuse hemangiomatosis
      • Klippel-Trenaunay-Weber
      • Kasabach-Merritt-like
      • Beckwith-Weidemann
  3. Hamartoma
    • associated with tuberous sclerosis
    • heterogeneously hyperintense relative to spleen on T2WI
    • diffuse enhancement in early post contrast phase that becomes more uniform on delayed images
  4. Lymphangioma
    • US: well defined, hypoechoic mass, internal septations, may have echogenic debris
    • CT: splenomegaly, single or multiple hypodense masses, may have peripheral calcifications, no enhancement post contrast
    • MR: hypointense T1WI, hyperintense T2WI

Elsayes KM, Narra VR, Mukundan G, et al. MR imaging of the spleen: spectrum of abnormalities. Radiographics 2005;25:967-82.
Urrutia M, Mergo PJ, Ros LH, et al. Cystic masses of the spleen: radiologic-pathologic correlation. Radiographics 1996;16:107-29.

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.