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Fig. 11 | Cancer Imaging

Fig. 11

From: Intra-patient comparison of physiologic 68Ga-PSMA-11 and 18F-DCFPyL PET/CT uptake in ganglia in prostate cancer patients: a pictorial essay

Fig. 11

Top panel 68Ga-PSMA-11: axial PET, axial CT and axial fused PET/CT. Lower panel 18F –DCFPyL: axial PET, axial CT and axial fused PET/CT. Left sacral ganglion uptake with 18F –DCFPyL (SUVmax = 3.1) (arrows) but not with 68Ga-PSMA-11 (circles). By CT, similar to lumbar ganglia, there are typically no anatomic structures detectable in the region of paravertebral ganglia; however, location, bilaterality and multiplicity would provide clues. Prevertebral sacral ganglion, however, may appear band like, linear or curvilinear, and given the proximity to primary sites, it is probably the most challenging ganglia to differentiate from nodal metastasis. This is particularly true if uptake in the ganglia is similar to that of metastatic lymph nodes [25]

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