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. 2021 Oct;62(10):1334–1340. doi: 10.2967/jnumed.120.259747

FIGURE 3.

FIGURE 3.

18F-FDG PET/MRI accurately stages rhabdomyosarcoma in 9-y-old girl. (A and B) Maximum-intensity projection of 18F-FDG PET scan (A) and 18F-FDG PET/MRI scan (B) show avid 18F-FDG uptake in lesion in thigh adductor muscles (blue arrow) and tiny additional 18F-FDG–avid lymph node in lateral thigh (yellow arrow). MRI helps to exclude any bone marrow disease or cortical invasion. (C and D) Axial contrast-enhanced fat-saturated T1-weighted MRI scan (C) and 18F-FDG PET/MRI scan (D) demonstrate relation between primary tumor (arrow) and superficial and deep femoral artery and vein. (E and F) Axial contrast-enhanced fat-saturated T1-weighted MRI scan (E) and 18F-FDG PET/MRI scan (F) demonstrate small lymph node (arrow) posterior to vastus lateralis muscle. Primary tumor and lymph node were resected and positive for sarcoma.