Abstract
A 65-year-old patient was examined with [11C]-choline positron emission tomography-computed tomography and magnetic resonance imaging (MRI) for possible tumor detection after two negative sessions of transrectal ultrasound-guided prostate biopsy and persistently elevated prostate-specific antigen levels for 27 months. Choline positron emission tomography revealed a small and circumscribed pathologic tracer uptake in the right dorsal peripheral gland. Whereas T2-weighted MRI and high b-value diffusion-weighted imaging were able to reproduce this suspicious area, proton MR spectroscopy showed no significant increase of the amplitude of choline-containing compounds. Magnetic resonance imaging-guided prostate biopsy was successfully performed. All specimens taken from the lesion showed a Gleason 5 tubular adenocarcinoma with low proliferative activity.
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