title: Utility of dynamic perfusion PET using ¹³N-ammonia in diagnosis of asymptomatic recurrence of fibrosarcoma.
abstract: Fibrosarcoma is a rare tumor involving the musculoskeletal system. Anatomic imaging modalities like CT and MRI are useful in characterization and staging of the tumor. FDG PET has variable sensitivity in evaluation of these tumors. Alternative tracers like FLT have been tried. It is a well-known fact that sarcomas are highly vascular. We report the utility of dynamic perfusion PET imaging using N13-ammonia in diagnosing a case of asymptomatic recurrence of fibrosarcoma in a 45-year-old patient. Despite very faint FDG avidity, ammonia perfusion imaging showed hypervascularity and allowed identification of the asymptomatic early recurrence.
authors.affiliation: Department of Nuclear Medicine and PET, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
authors.forename: Chidambaram Natrajan Balasubramanian
authors.initials: CN
authors.lastname: Harisankar
authors.forename: Bhagwant Rai
authors.initials: BR
authors.lastname: Mittal
authors.forename: Ankit
authors.initials: A
authors.lastname: Watts
authors.forename: Anish
authors.initials: A
authors.lastname: Bhattacharya
authors.forename: Ramesh
authors.initials: R
authors.lastname: Sen
mesh_terms: D000641:Ammonia; D005354:Fibrosarcoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009590:Nitrogen Radioisotopes; D055420:Perfusion Imaging / Q000379:methods*; D049268:Positron-Emission Tomography / Q000379:methods*; D012008:Recurrence
chemical_list: D009590:Nitrogen Radioisotopes; D000641:Ammonia