Fig. Axial CT with IV contrast shows a rind of enhancing soft tissue in the posterior aspect of the left perirenal space (left arrow), and nodular thickening of the posterior pararenal fascia (right arrow). The patient has a known, treated Burkitt lymphoma.
Lymphoma and Kidneys
- Usually extranodal sites of lymphoma
- Primary renal lymphoma very rare
- Renal involvement usually in late disease, and clinically silent
- More common with non-Hodgkin disease
Typical CT Patterns of Renal Lymphoma
- Multiple masses -- most common, bilateral > unilateral
- Solitary masses
- Contiguous retroperitoneal extension
- Perirenal disease
- Infiltrative disease - almost always bilateral, preserved renal contour
Either from direct extension from retroperitoneal disease, transcapsular spread of renal parenchymal disease, or less commonly lymphoma completely surrounds the kidney
Our case is a biopsy-proven perirenal lymphoma.
Urban BA, et al. Renal Lymphoma: CT Patterns with Emphasis on Helical CT. Radiographics 2000;20:197.