title: Impact of modified radical neck dissections on the number of retrieved nodes, recurrence and survival.
abstract: Neck dissection is an integral part of head and neck tumors. Throughout its history, it has undergone changes looking for an improvement in functional outcome without loss of oncologic efficiency.
  
  
  OBJECTIVE
  Demonstrate that the modified radical neck dissection have an oncologic results comparable to classical radical dissection.
  
  
  METHODS
  We included patients with squamous cell carcinoma of the lower floor of the mouth and oropharynx, who underwent radical classic or modified neck dissection. We excluded from this analysis those patients who had undergone previous treatment or extended neck dissection.
  
  
  METHODS
  Retrospective study, involving an institution.
  
  
  RESULTS
  We identified 481 patients who met the inclusion criteria, corresponding to 521 dissections. The average number of lymph nodes dissected was 44.92 (SD 16:45) lymph nodes to the RCT, 44.16 (SD 15.76) for the MRND + XI and 56.02 (SD 22.91) for the ECRM IJV + XI. The ANOVA indicated a statistically significant difference between groups (p<0.001). The type of neck dissection was not significant for regional recurrence or disease-specific survival.
  
  
  CONCLUSIONS
  The use of modified neck dissection has no significant impact on the pathological staging, disease-free survival or disease-specific survival.
authors.affiliation: Pathology Department, A. C. Camargo Hospital, Brazil.
authors.forename: Hugo Fontan
authors.initials: HF
authors.lastname: Kohler
authors.forename: Isabella Werneck da
authors.initials: IW
authors.lastname: Cunha
authors.forename: Luiz Paulo
authors.initials: LP
authors.lastname: Kowalski
mesh_terms: D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006258:Head and Neck Neoplasms / Q000601:surgery*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection / Q000379:methods*; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D016896:Treatment Outcome