title: A solitary fibrous tumor arising in the parapharyngeal space, with MRI and FDG-PET findings.
abstract: We present the imaging and pathological features of a 38-year-old man in whom a large parapharyngeal solitary fibrous tumor (SFT) on the left side was found. On MRI, the tumor showed a nodule-in-nodule appearance. The inner nodule revealed high signal intensities both on T1- and T2-weighted MR images. The entire tumor showed heterogeneous enhancement on gadolinium-enhanced T1-weighted images. (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET) identified heterogeneous radiotracer uptake of FDG in the inner nodule of the tumor. Histologic examinations revealed an admixture of growth patterns, including a "patternless pattern" and "haemangiopericytoma-like pattern". The tumor was positive for CD34. Imaging features of SFT arising in the parapharyngeal space are discussed with a review of literatures. This is the first report of FDG-PET finding of SFT arising in the head and neck. More cases are needed to achieve diagnostic significance from FDG-PET findings of parapharyngeal SFTs.
authors.affiliation: Department of Otolaryngology, School of Medicine, Kanazawa University, Japan.
authors.forename: Naohiro
authors.initials: N
authors.lastname: Wakisaka
authors.forename: Satoru
authors.initials: S
authors.lastname: Kondo
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Murono
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Minato
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Furukawa
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Yoshizaki
mesh_terms: D000328:Adult; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009361:Neoplasm Invasiveness; D010610:Pharyngeal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D054364:Solitary Fibrous Tumors / Q000000981:diagnostic imaging* / Q000473:pathology*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18