title: Actinomyces-induced inflammatory myofibroblastic tumor of the colon: A rare cause of an abdominal mass: Akbulut et al. inflammatory myofibroblastictumor due to actinomyces spp.
abstract: BACKGROUND
  Inflammatory myofibroblastic tumors (IMFTs) are neoplastic lesions that are either benign or have low-grade malignancy potential. Although the etiopathogenesis is not entirely clear, many factors play a role in their development, including trauma, autoimmune disorders, and infectious and inflammatory processes. However, IMFTs caused by Actinomyces spp. infection are rare, with a limited number of cases reported in the literature.
  
  
  METHODS
  A 30-year-old woman was admitted to our clinic with abdominal pain and a palpable abdominal mass. Contrast-enhanced computed tomography revealed a tumoral lesion (11×10×7cm) in the right colon. A right hemicolectomy and ileocolic anastomosis were performed, during which almost complete obstruction of the lumen by the 7.5×7.0×5.0cm tumor was observed. Histopathology and immunohistochemical findings revealed that the tumor was consistent with an IMFT that developed from an Actinomyces infection. The patient was then placed on amoxicillin and doxycycline therapy.
  
  
  CONCLUSIONS
  This case demonstrates that the development of IMFT secondary to actinomycosis is difficult to predict in the preoperative period. Once an exact diagnosis is confirmed by histopathologic examination, affected patients should receive prolonged antibiotherapy.
authors.affiliation: Department of Surgery, Diyarbakir Education and Research Hospital, 21400 Diyarbakir, Turkey. Electronic address: akbulutsami@gmail.com.
authors.forename: Sami
authors.initials: S
authors.lastname: Akbulut
authors.affiliation: Department of Surgery, Diyarbakir Education and Research Hospital, 21400 Diyarbakir, Turkey.
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Yagmur
authors.affiliation: Department of Surgery, Diyarbakir Education and Research Hospital, 21400 Diyarbakir, Turkey.
authors.forename: Serdar
authors.initials: S
authors.lastname: Gumus
authors.affiliation: Department of Surgery, Diyarbakir Education and Research Hospital, 21400 Diyarbakir, Turkey.
authors.forename: Nilgun
authors.initials: N
authors.lastname: Sogutcu
authors.affiliation: Department of Surgery, Diyarbakir Education and Research Hospital, 21400 Diyarbakir, Turkey.
authors.forename: Firat
authors.initials: F
authors.lastname: Demircan
keywords: Actinomycosis; Colon; Immunhistochemical stain; Inflammatory myofibroblastic tumor