A solitary fibrous tumor arising in the parapharyngeal space, with MRI and FDG-PET findings.
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.
Wakisaka
Naohiro
N
Department of Otolaryngology, School of Medicine, Kanazawa University, Japan.
Kondo
Satoru
S
Murono
Shigeyuki
S
Minato
Hiroshi
H
Furukawa
Mitsuru
M
Yoshizaki
Tomokazu
T
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*
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18