Fig. 9
From: Multimodality imaging of renal lymphoma and its mimics
Renal sinus involvement of renal lymphoma. Coronal MRI post contrast (a) and T2 weighted (b) images demonstrate a T2 hypointense, hypoenhancing infiltrative left renal mass (arrows) invading the upper pole collecting system and lower kidney. Note the resultant mild hydronephrosis relative to tumor size. PET/CT (c) shows the marked F18-FDG avid left renal mass (arrow) as well as splenic masses (arrowhead). This was biopsy-proven high-grade B-cell lymphoma