title: A low grade fibromyxoid sarcoma originating from the masseter muscle: a case report.
abstract: BACKGROUND
  Low grade fibromyxoid sarcoma is a distinctive variant of fibrosarcoma. We recently experienced a rare case of low grade fibromyxoid sarcoma arising in the masseter muscle.
  
  
  METHODS
  A 63-year-old Korean woman with a large growing mass in her right parotid gland area for 1 year visited our clinic. Complete removal of the tumor was achieved by parotidectomy with facial nerve preservation. The tumor measured over 4cm with pathologic findings compatible with low grade fibromyxoid sarcoma.
  
  
  CONCLUSIONS
  Low grade fibromyxoid sarcoma is an extremely rare tumor, and report of the present case is noteworthy since it represents a rare localization of low grade fibromyxoid sarcoma in the head and neck. Close follow up on a long-term basis is considered necessary because of its high potential to metastasize.
authors: Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 135-720,, Seoul, Korea. starlej@yuhs.ac.
authors: Eun Jung
authors: EJ
authors: Lee
authors: Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 135-720,, Seoul, Korea. hyess44@yuhs.ac.
authors: Hye Jin
authors: HJ
authors: Hwang
authors: Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 135-720,, Seoul, Korea. ewell@yuhs.ac.
authors: Hyung Kwon
authors: HK
authors: Byeon
authors: Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 135-720,, Seoul, Korea. turtle98p@yuhs.ac.
authors: Heae Surng
authors: HS
authors: Park
authors: Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 135-720,, Seoul, Korea. hschoi@yuhs.ac.
authors: Hong-Shik
authors: HS
authors: Choi
mesh_terms: D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D005354:Fibrosarcoma / Q000175:diagnosis* / Q000601:surgery*; D005682:Gadolinium; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D008406:Masseter Muscle / Q000473:pathology* / Q000601:surgery*; D008875:Middle Aged; D010306:Parotid Gland / Q000473:pathology / Q000601:surgery; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000601:surgery*
chemical_list: D003287:Contrast Media; D005682:Gadolinium