J Nucl Med. 2008; 49 (Supplement 1):175P
Educational Exhibits (Poster Only)Oncology Posters |
PET/CT findings of renal lymphoma
Samuel Almodovar1,
David Israel1 and
Christopher Sakellis1
1 Radiology, Dana-Farber Cancer Institute, Boston, Massachusetts
766
Learning Objectives: 1. Review the main imaging patterns of renal lymphoma on PET/CT aided by illustrative figures. 2. Gain an understanding of both typical and atypical imaging findings of lymphomatous renal involvement. 3. Recognize the impact of the PET/CT renal findings on management recommendations in the context of whole-body tumor burden. 4. Review important concepts related to renal post-transplantation lymphoproliferative disorder (PTLD).
Abstract Body: Renal involvement with lymphoma is mostly discovered in patients with known lymphoma during cross-sectional imaging work-up. FDG-PET/CT has become a modality of choice in the staging and follow-up of lymphoma. Evaluation of kidney lesions by FDG-PET/CT can be challenging due to physiologic renal excretion of FDG. Correct image interpretation requires a clear understanding of the typical and atypical findings of renal lymphomatous involvement on PET/CT, which are listed below: 1. Typical - multiple renal masses - solitary mass - direct invasion of the kidneys by retroperitoneal tumor - bilateral renal enlargement - perirenal soft-tissue masses 2. Atypical - spontaneous hemorrhage - necrosis - cystic transformation - calcifications - heterogeneous attenuation on contrast-enhanced CT Renal findings of lymphoma on PET/CT need to be evaluated in the context of whole-body tumor burden as the extent of extra-renal findings will impact further management. Important concepts related to PTLD will also be discussed. These topics will be illustrated by PET/CT case examples, figures and correlative images.
