title: Incidental detection of rare mesenteric inflammatory pseudotumor by (18)F-FDG PET.
abstract: A 60 years old asymptomatic male underwent fluorine-18 fluorodeoxyglucose  positron emission tomography ((18)F-FDG PET) for his medical check-up, and  abnormal (18)F-FDG uptake was observed in the retroperitoneum. The maximum  standardized uptake value (SUV (max)) was 5.2. Based on CT, MRI  and (18)F-FDG PET findings, the differential diagnosis included specific or non-specific  inflammatory change, malignant lymphoma, trauma,  gastrointestinal stromal tumor and soft-tissue sarcoma. Tumor resection was performed, and the histopathological finding  was an inflammatory pseudotumor (IPT) originating at the mesentery in the retropetonium.  After two years and eight months from his initial operation, recurrent IPT was detected  by (18)F-FDG PET for follow-up, although he was asymptomatic. The IPT could be of traumatic  origin since the patient suffered a severe abdominal trauma 6 months before.  A mesenteric IPT is very rare, and to our knowledge, this is the first case report of (18)F-FDG PET  detecting a mesenteric IPT. In conclusion, when abnormal high (18)F-FDG uptake is observed in the  mesentery incidentally in clinical routine examination, IPT should be included as one of the  differential diagnoses. (18)F-FDG may be useful in detecting local recurrence and follow-up  after operation.
authors.affiliation: Division of Nuclear Medicine, PET Center and Department of Radiology, Kurume University School of Medicine, 67Asahi-Machi, Kurume, Fukuoka, 830-0011, Japan.
authors.forename: Yasumitsu
authors.initials: Y
authors.lastname: Hirose
authors.forename: Hayato
authors.initials: H
authors.lastname: Kaida
authors.forename: Seiji
authors.initials: S
authors.lastname: Kurata
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Okabe
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Kage
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Ishibashi
mesh_terms: D019788:Fluorodeoxyglucose F18; D006104:Granuloma, Plasma Cell / Q000000981:diagnostic imaging*; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008643:Mesentery / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010532:Peritoneal Diseases / Q000000981:diagnostic imaging*; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18