Case of the Week: Colonic Lymphoma (CT & PET)

In this radiology lecture, we discuss the imaging appearance of large bowel lymphoma.

Key points include:

  • Often isodense to skeletal muscle.
  • May have aneurysmal dilatation of involved bowel.
  • Less likely obstructive and longer segment involvement compared to colonic adenocarcinoma.
  • Located near ileocecal valve.
  • GI lymphoma: Most common in stomach, followed by small bowel (ileum, jejunum, duodenum), least common site colorectal.
  • Splenomegaly and severe lymphadenopathy favor lymphoma but may not be present.

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