Incidental Detection of Meningioma by 18F-FMAU PET/CT in a Patient With Suspected Prostate Cancer

We report on an incidental detection of a meningioma on [(18)F]-2′-fluoro-5-methyl-1-beta-D-arabinofuranosyluracil ((18)F-FMAU) PET/CT scan that was performed during a prospective investigation of (18)F-FMAU PET/CT for targeted biopsy of potential sites of tumor in men with suspected prostate cancer based on elevated prostate specific antigen level. Neither prostate multiparamteric MRI nor (18)F-FMAU PET/CT localized small volume Gleason 3+3 tumor deposits. However, an incidental focal high accumulation of (18)F-FMAU was observed in high right parietal lobe that displayed characteristics of a meningioma on a subsequent brain MRI.