title: Primary non-Hodgkin's splenic lymphoma.
abstract: OBJECTIVE
  To describe the imaging, clinical and pathological features of primary splenic lymphoma using a strict definition.
  
  
  METHODS
  Of 21 cases, plain films were available in nine, sonograms in 10 and CT in 16. We categorized the spleen as either normal, enlarged with no focal defects (type 1), studded with miliary masses (type 2), containing multifocal masses of varying size (1-10 cm) (type 3) or containing a solitary large mass >5 cm without (type 4A) or with (type 4B) central hypodensity/anechoic areas.
  
  
  RESULTS
  Clinical presentations were left upper quadrant pain, weight loss and/or fever. One case was found incidentally on CT. Fourteen were type 4A, three type 4B, four type 3 and none were type 1 or 2. Nine of 10 cases were hypoechoic. In 11/12 cases with enhanced scans, the lesions are hypodense relative to the splenic parenchyma, and in one case, the lesion was necrotic. Rim enhancement was seen in one case.
  
  
  CONCLUSIONS
  Primary splenic lymphoma usually presents as a mass or masses rather than with splenomegaly alone. Splenectomy may be required for diagnosis.
authors.affiliation: Department of Radiology, The University of Chicago, IL 60637, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Dachman
authors.forename: J L
authors.initials: JL
authors.lastname: Buck
authors.forename: J
authors.initials: J
authors.lastname: Krishnan
authors.forename: N S
authors.initials: NS
authors.lastname: Aguilera
authors.forename: P C
authors.initials: PC
authors.lastname: Buetow
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013160:Splenic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography