title: False-positive positron emission tomography appearance with 18F-fluorodeoxyglucose after definitive radiotherapy for cancer of the mobile tongue.
abstract: (18)F-fluorodeoxyglucose-positron emission tomography (FDG-PET) is an effective tool for evaluating the results of radiotherapy. However, some false-positive appearances caused by physiological or pathological accumulation are reported. We report on three patients who showed a high accumulation of FDG in the lingual muscles but had no recurrent tumour after definitive radiotherapy for the mobile tongue. All patients had squamous cell carcinoma of the tongue and received interstitial radiotherapy with small sources. High uptake was seen in the lingual muscles without recurrence or inflammation, based on physical and MR examinations. This false-positive appearance is thought to relate to ill-balanced high activity of the lingual muscles after definitive radiotherapy.
authors.affiliation: Department of Radiation Oncology, Aichi Cancer Center Hospital, Chikusa-ku, Nagoya 461-8681, Japan. ariji@dpc.agu.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Ariji
authors.forename: N
authors.initials: N
authors.lastname: Fuwa
authors.forename: T
authors.initials: T
authors.lastname: Kodaira
authors.forename: H
authors.initials: H
authors.lastname: Tachibana
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: Y
authors.initials: Y
authors.lastname: Satoh
authors.forename: E
authors.initials: E
authors.lastname: Ariji
mesh_terms: D000328:Adult; D001918:Brachytherapy; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D005189:False Positive Reactions; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging*; D049268:Positron-Emission Tomography / Q000379:methods; D014062:Tongue Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D055815:Young Adult
chemical_list: D019788:Fluorodeoxyglucose F18