title: Unexpected diagnosis of peripheral schwannoma on 18F-fluoroethylcholine PET/CT for localization of prostate cancer recurrence and biopsy under real-time PET/ultrasound fusion guidance.
abstract: 18F-Fluoroethylcholine (18F-FEC) PET/CT is well established for the detection of prostate cancer recurrence. However, its specificity is sometimes impaired by false-positive findings. In the present case, atypical cancer recurrence in the right distal lower leg was suspected on 18F-FEC PET/CT in a patient with a history of prostate cancer and an increased prostate-specific antigen level. Using a real-time PET/ultrasound fusion technique, the tumor was localized and a biopsy carried out, leading to a final diagnosis of peripheral schwannoma.
authors.affiliation: From the Clinic of Nuclear Medicine, Jena University Hospital, Jena, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Freesmeyer
authors.forename: Robert
authors.initials: R
authors.lastname: Drescher
authors.forename: Thomas
authors.initials: T
authors.lastname: Winkens
mesh_terms: D000368:Aged; D002794:Choline / Q000031:analogs & derivatives*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D061705:Image-Guided Biopsy; D033162:Incidental Findings; D008297:Male; D064847:Multimodal Imaging; D009442:Neurilemmoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology*; D049268:Positron-Emission Tomography; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology*; D012008:Recurrence; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
chemical_list: C448902:fluoroethylcholine; D002794:Choline