title: Fluorine-18 fluorodeoxyglucose uptake in the retractile testis.
abstract: A 51-year-old man with a palpable mass in his right inguinal region had fluorine-18 fluorodeoxyglucose (F-18 FDG) whole-body positron emission tomography (PET) in our cancer screening program. FDG accumulated in the mass, suggesting a metabolically active lesion that was likely malignant. A pelvic MRI and a urologist's palpation revealed that his inguinal mass was a retractile testis. Because a retractile testis is a benign process with no need for interventional therapy, it would be considered a false-positive finding on the cancer screening program using F-18 FDG PET.
authors.affiliation: HIMEDIC Imaging Center at Lake Yamanaka, Yamanashi, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Fujii
authors.forename: S
authors.initials: S
authors.lastname: Yasuda
authors.forename: M
authors.initials: M
authors.lastname: Ide
authors.forename: W
authors.initials: W
authors.lastname: Takahashi
authors.forename: A
authors.initials: A
authors.lastname: Shohtsu
authors.forename: A
authors.initials: A
authors.lastname: Kubo
mesh_terms: D005189:False Positive Reactions; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007264:Inguinal Canal / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000000981:diagnostic imaging*; D019275:Radiopharmaceuticals; D013737:Testis / Q000000981:diagnostic imaging* / Q000473:pathology; D014055:Tomography, Emission-Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18