title: [Endoscopic transnasal surgery for malignant sinus tumors involving orbit: clinical analyses of 34 cases].
abstract: OBJECTIVE
  To investigate the effect of endoscopic transnasal surgery for malignant sinus tumors involving the orbit, and to analyse the factors affecting the prognosis.
  
  
  METHODS
  Thirty-four cases of malignant sinus tumors involving the orbit, who underwent surgical treatment in Chinese people's liberation army general hospital between January 2009 and April 2015, were reviewed retrospectively. The 5-year survival rate, the recurrence rate and the complications was analysed, the factors affecting prognosis were discussed.
  
  
  RESULTS
  Among 34 patients, 2 patients were lost to follow-up. Follow-up time of 32 patients ranged 7 to 75 months. The 5-year overall survival(OS)in this group was 53%. Twelve cases recurred, the recurrence rate was 35%. Eye function improved in 26 cases, the improvement rate was 76.5%. Four cases developed diplopia and peri-orbital swelling after surgery, and simple peri-orbit swelling in 25 cases. The 5-year survive rate of stage 1, stage 2 and stage 3 were 80%, 36% and 25%, respectively, with significant difference(χ(2)=6.643, P=0.036).
  
  
  CONCLUSIONS
  Endoscopic transnasal surgery for malignant sinus tumors is effective, minimally invasive and accurate. The prognosis is closely related to the clinical stages and the pathological type.
authors.affiliation: Department of Otorhinolarnygology Head and Neck Surgery, Chinese People's Libration Army General Hospital, Beijing 100853, China.
authors.forename: X J
authors.initials: XJ
authors.lastname: Hao
authors.affiliation: Department of Otorhinolarnygology Head and Neck Surgery, Chinese People's Libration Army General Hospital, Beijing 100853, China.
authors.forename: L
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Otorhinolarnygology Head and Neck Surgery, Chinese People's Libration Army General Hospital, Beijing 100853, China.
authors.forename: L
authors.initials: L
authors.lastname: Chen
mesh_terms: D004724:Endoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D059012:Lost to Follow-Up; D008297:Male; D009918:Orbital Neoplasms / Q000401:mortality / Q000601:surgery*; D010255:Paranasal Sinus Neoplasms / Q000401:mortality / Q000601:surgery*; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate