ARRS 2022 Abstracts

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E2042. Cased-Based, Multimodality FDG PET/CT Imaging of Non-Malignant Musculoskeletal Conditions
Authors
  1. Meera Raghavan; Donald & Barbara Zucker School of Medicine at Hofstra/Northwell; Northwell Health
Background
This educational exhibit will illustrate the FDG PET/CT appearance of commonly encountered non-malignant musculoskeletal conditions through a case-based, multimodality approach. Background and introduction on FDG PET/CT will be presented. FDG PET/CT cases with correlative radiologic imaging will be shown with a description of the findings and differential diagnoses, followed by a discussion and key points aside about each condition. A few examples of the case presented include: inflammatory arthritides such as psoriatic and rheumatoid arthritis, medication-related osteonecrosis jaw, sacral insufficiency fracture, spondylodiscitis, radiation osteitis, and marrow effects of colony stimulating factors.

Educational Goals / Teaching Points
The learning objectives for this educational exhibit are to 1) recognize that non-malignant entities can demonstrate FDG uptake; 2) identify FDG PET/CT imaging features of several non-oncologic musculoskeletal diagnoses; 3) compare and contrast findings on FDG PET/CT with correlative radiologic imaging; and 4) recognize the complementary role of radiology and FDG PET/CT in the evaluation of these musculoskeletal conditions.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
FDG PET/CT cases with correlative radiologic imaging, including radiographs, CT, MRI, or nuclear studies will be shown with a description of the findings and differential diagnoses, followed by a discussion and key points aside about each condition.

Conclusion
Non-malignant musculoskeletal conditions can demonstrate FDG avidity. Some etiologies include inflammatory arthritides, fractures (post traumatic, iatrogenic), treatment-related sequalae, infections, and degenerative processes. FDG PET is complementary to radiologic imaging (CT, MRI, radiography) in the evaluation of these conditions. It is imperative for radiologists and nuclear medicine physicians to recognize and properly report these findings as they can impact patient management.