title: Synovial Sarcoma- A Rare Tumor of the Larynx.
abstract: BACKGROUND
  Malignant mesenchymal tumors of the larynx are rare. One type of malignant mesenchymal tumor is synovial sarcoma with unknown histogenesis, which occurs predominantly in the lower extremities of young adults. The head and neck region is a relatively rare location. There are few cases of malignant mesenchymal tumors with laryngeal localization in literature.
  
  
  METHODS
  In this report, a new case in a 23-year-old man, which was referred with increasing hoarseness for eight months, and dysphagia, odynophagia, and dyspnea since nearly one year ago, is reported. Indirect laryngoscopy revealed a laryngeal submucosal mass. The patient was operated and the histopathological diagnosis of synovial sarcoma was confirmed by IHC (Immunohistochemisry).
  
  
  CONCLUSIONS
  Synovial sarcoma occurs predominantly in the lower extremities of young adults. Because very few cases of laryngeal synovial sarcoma are reported, every new case will bring some new information about diagnosis and therapy. It is of utmost importance to get to know new aspects and therapeutical modalities of this rare tumor.
authors.affiliation: Department of Otorhinolaryngology, Tabriz university of Medical Science, Tabriz, Iran.
authors.forename: Ghodrat
authors.initials: G
authors.lastname: Mohammadi
authors.affiliation: Department of Otorhinolaryngology, Tabriz university of Medical Science, Tabriz, Iran.
authors.forename: Arezu
authors.initials: A
authors.lastname: Khansarinia
keywords: Larynx; Malignant mesenchymal tumors; Synovial sarcoma