title: Examining the need for neck dissection in the era of chemoradiation therapy for advanced head and neck cancer.
abstract: OBJECTIVE
  To (1) determine clinical factors that predict pathologic complete response (pCR) on neck dissection after sequential chemoradiotherapy (SCRT) for advanced head and neck cancer and (2) compare survival parameters between those who underwent neck dissection and those who did not among those patients with a clinical complete response (cCR) in the neck after SCRT, thus assessing the benefit of neck dissection in patients with a cCR in the neck.
  
  
  METHODS
  Retrospective review with a mean follow-up of 3.5 years.
  
  
  METHODS
  Regional cancer center.
  
  
  METHODS
  The study population comprised 55 patients undergoing SCRT for advanced head and neck cancer with N2 or N3 neck disease. Three patients developed progressive disease and were excluded, and 28 patients underwent neck dissection.
  
  
  METHODS
  Patients were assessed by physical examination and radiographically after SCRT.
  
  
  METHODS
  Physical examination and radiographic assessments of residual neck disease were compared with pathologic findings in those patients who underwent neck dissection. Survival comparisons were made between patients with a cCR in the neck who underwent neck dissection and those who did not.
  
  
  RESULTS
  Of 28 patients who underwent neck dissection, 8 had persistent pathologically positive nodal disease: 5 (45%) of 11 had N3 and 3 (18%) of 17 had N2 disease. Individual clinical neck assessments after SCRT were fairly predictive of a negative pathologic finding at neck dissection. The negative predictive values were physical examination (75%), computed tomography or magnetic resonance imaging (71%), and positron emission tomography (75%). However, when physical examination, imaging studies, and positron emission tomography all indicated a complete response, this accurately predicted a pCR on neck dissection. There appeared to be no improvement in survival parameters when a neck dissection was performed on patients with a cCR in the neck.
  
  
  CONCLUSIONS
  Patients with N3 disease are at high risk for residual neck metastasis after SCRT. Patients with N2 disease can be assessed with physical examination, imaging studies, and positron emission tomography. If these all indicate a cCR, then neck dissection is likely not needed. Neck dissection did not appear to further improve survival parameters for patients with a cCR in the neck.
authors.affiliation: Division of Otolaryngology, Department of Surgery, Brigham and Women's Hospital and the Dana Farber Cancer Institute, Boston, MA 02115, USA. lgoguen@partners.org
authors.forename: Laura A
authors.initials: LA
authors.lastname: Goguen
authors.forename: Marshall R
authors.initials: MR
authors.lastname: Posner
authors.forename: Roy B
authors.initials: RB
authors.lastname: Tishler
authors.forename: Lori J
authors.initials: LJ
authors.lastname: Wirth
authors.forename: Charles M
authors.initials: CM
authors.lastname: Norris
authors.forename: Donald J
authors.initials: DJ
authors.lastname: Annino
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Sullivan
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Robert I
authors.initials: RI
authors.lastname: Haddad
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*; D017024:Chemotherapy, Adjuvant; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection; D009367:Neoplasm Staging; D010039:Otorhinolaryngologic Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*; D010043:Outcome and Process Assessment, Health Care; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D015996:Survival Rate