case_images: PMC10940431_01
case_images: FDG PET/CT axial (A-C) and coronal (D-F) PET, CT and fused PET/CT images of the left lower pole renal mass (arrow) demonstrating no FDG uptake. Whole body I131 post therapy scan (G, H) performed within 6 weeks of the FDG-PET/CT scan, shows no appreciable I131 accumulation within the renal mass.
case_images: fonc-14-1282508-g001.jpg
case_images: PMC10940431_01_fonc-14-1282508-g001.jpg
case_images: f1
case_images: The FDG PET/CT showed an incidental finding of benign non FDG avid renal mass consistent with renal oncocytoma based on morphological appearance ( Figure 1 ).
case_images: FDG PET/CT axial (A-C) and coronal (D-F) PET, CT and fused PET/CT images of the left lower pole renal mass (arrow) demonstrating intense FDG uptake with SUV max 11.5. Whole body I131 post therapy anterior and posterior scan (G, H) performed within 6 weeks of the PET image, shows I131 accumulation within the renal mass (yellow arrow).
case_images: fonc-14-1282508-g002.jpg
case_images: PMC10940431_01_fonc-14-1282508-g002.jpg
case_images: f2
case_images: Over a follow-up period of two-years, this lesion showed interval increase in FDG uptake to a marked level (above reference liver) with yet minimal increase in size ( Figure 2 ), as well as interval development of I131 uptake in consecutives post therapy images.
case_images: Enhanced MRI for the abdomen revealed solid enhancing left lower pole lesion with diffusion restriction.
case_images: fonc-14-1282508-g003.jpg
case_images: PMC10940431_01_fonc-14-1282508-g003.jpg
case_images: f3
case_images: Enhanced abdomen MRI was performed, and it revealed a solid enhancing left lower pole lesion with diffusion restriction; this appearance was suspicious for a small renal cell carcinoma RCC ( Figure 3 ).
case_images: FDG PET/CT axial (A-C) and coronal (D-F) PET, CT and fused PET/CT images of the left lower pole renal mass (arrow) demonstrating interval increase in size and FDG uptake with SUVmax16.9. Whole body I131 post therapy anterior and posterior scan (G, H) performed within 6 weeks of the PET image, shows significant increase in I131 accumulation within the renal mass (yellow arrow).
case_images: fonc-14-1282508-g004.jpg
case_images: PMC10940431_01_fonc-14-1282508-g004.jpg
case_images: f4
case_images: A 3-months follow-up FDG PET/CT (Figure 4) showed further increase in metabolic activity and size [SUV max 16.9, size 3.1 x 3.2 cm].