Renal Lymphoma

Imaging

• CECT

  • Multiple bilateral renal masses (40-60%)

  • Homogeneous, mild enhancement (10-20 HU)

  • Retroperitoneal adenopathy (25%), splenomegaly, or lymphadenopathy at other sites

  • Infiltration of renal parenchyma or sinus with maintenance of reniform shape; may simulate transitional cell carcinoma

  • Extranodal sites: Bowel, brain, liver, bone marrow

• MR

  • T1: Iso- to slightly hypointense

  • T2: Typically hypointense

  • T1WI C+ FS: Mild enhancement

• US

  • Solid, hypoechoic lesions relative to renal parenchyma

  • ± internal flow; power Doppler improves sensitivity