False-Positive Result in 18F-Fluorocholine PET/CT Due to Incidental and Ectopic Parathyroid Hyperplasia

Abstract
PET/CT with F-fluorocholine (a positron-labeled choline analog) is currently used as a diagnostic tool for restaging prostate cancer patients with increasing prostate-specific antigen. We present an unusual case of a false-positive result using F-fluorocholine PET/CT because of incidental and ectopic parathyroid hyperplasia