title: Inflammatory pseudotumor of the liver diagnosed as metastatic liver tumor in a patient with a gastrointestinal stromal tumor of the rectum: report of a case.
abstract: BACKGROUND
  Inflammatory pseudotumor (IPT) of the liver is a rare benign lesion. A case of IPT of the liver found in association with a malignant gastrointestinal stromal tumor (GIST) is reported.
  
  
  METHODS
  A 74-year-old man was admitted to our hospital for a liver tumor. He previously underwent rectal amputation for a malignant GIST. Computed tomography (CT) revealed a low-density area in the liver and dynamic contrast-enhanced MRI (EOB-MRI) showed that the tumor was completely washed out in the delayed phase. 18Fluorine-fluorodeoxyglucose positron emission tomography (FDG-PET) showed strong uptake in the liver. A diagnosis of liver metastasis was made and partial hepatectomy was performed. Microscopic examination showed that the tumor was an IPT.
  
  
  CONCLUSIONS
  Differential diagnosis between IPT and malignant neoplasms is difficult. Moreover, FDG-PET revealed strong uptake in the tumor. To our knowledge, this is the first patient reported to have an IPT in association with a rectal GIST. This patient is discussed along with a review of the literature.
authors.affiliation: Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, 4678601, Japan. matsuo@med.nagoya-cu.ac.jp.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Mikinori
authors.initials: M
authors.lastname: Sato
authors.forename: Takahiro
authors.initials: T
authors.lastname: Shibata
authors.forename: Mamoru
authors.initials: M
authors.lastname: Morimoto
authors.forename: Ken
authors.initials: K
authors.lastname: Tsuboi
authors.forename: Tomoya
authors.initials: T
authors.lastname: Shamoto
authors.forename: Takahisa
authors.initials: T
authors.lastname: Hirokawa
authors.forename: Takafumi
authors.initials: T
authors.lastname: Sato
authors.forename: Hiroki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Takeyama
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D046152:Gastrointestinal Stromal Tumors / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D007249:Inflammation / Q000175:diagnosis* / Q000628:therapy; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000628:therapy; D008279:Magnetic Resonance Imaging; D008297:Male; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography; D011379:Prognosis; D019275:Radiopharmaceuticals; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D014057:Tomography, X-Ray Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18