title: Malignant peritoneal mesothelioma with lymph node metastasis that originated in the transverse colon.
abstract: BACKGROUND
  We report an extremely rare case of resection of localized biphasic malignant peritoneal mesothelioma of the transverse colon.
  
  
  METHODS
  Computed tomography and magnetic resonance imaging in a 72-year-old man showed a tumor with enhanced borders consistent with the transverse colon. Colonoscopy showed ulcerative lesions in the transverse colon, but histological examination showed no malignancy. A gastrointestinal stromal tumor was strongly suspected, so an extended right hemicolectomy was performed. Histopathological examination showed that the tumor was a localized malignant peritoneal mesothelioma of the transverse colon. The patient did not receive postoperative chemotherapy and died 18 months after surgery.
  
  
  CONCLUSIONS
  The number of patients with malignant mesotheliomas is predicted to increase in the future both in Japan and in western countries. We report this case due to its probable usefulness in future studies pertaining to the diagnosis and treatment of malignant mesotheliomas.
authors.affiliation: Digestive Disease Center, Showa University Northern Yokohama Hospital, 35-1 Chigasaki-chuo, Tsuzuki-ku, Yokohama, Kanagawa pref, 224-8503, Japan. yuutake47@yahoo.co.jp.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Takehara
authors.forename: Shungo
authors.initials: S
authors.lastname: Endo
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Mori
authors.forename: Kenta
authors.initials: K
authors.lastname: Nakahara
authors.forename: Daisuke
authors.initials: D
authors.lastname: Takayanagi
authors.forename: Shoji
authors.initials: S
authors.lastname: Shimada
authors.forename: Tomokatsu
authors.initials: T
authors.lastname: Omoto
authors.forename: Chiyo
authors.initials: C
authors.lastname: Maeda
authors.forename: Shumpei
authors.initials: S
authors.lastname: Mukai
authors.forename: Eiji
authors.initials: E
authors.lastname: Hidaka
authors.forename: Fumio
authors.initials: F
authors.lastname: Ishida
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Tanaka
authors.forename: Shin-ei
authors.initials: SE
authors.lastname: Kudo
mesh_terms: D000368:Aged; D044684:Colon, Transverse / Q000473:pathology* / Q000601:surgery; D003110:Colonic Neoplasms / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary* / Q000601:surgery; D008207:Lymphatic Metastasis; D008279:Magnetic Resonance Imaging; D008297:Male; D008654:Mesothelioma / Q000556:secondary* / Q000601:surgery; D000086002:Mesothelioma, Malignant; D010534:Peritoneal Neoplasms / Q000556:secondary* / Q000601:surgery; D011379:Prognosis; D014057:Tomography, X-Ray Computed
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