title: An analysis of factors predicting lateral cervical nodal metastases in papillary carcinoma of the thyroid.
abstract: OBJECTIVE
  To analyze the possible correlation between the location of the primary tumor within the thyroid gland and the patterns of central vs lateral compartment lymph node metastasis.
  
  
  METHODS
  Retrospective analysis of papillary thyroid carcinoma (PTC) treated in an academic university setting from July 1, 2004, through August 31, 2010.
  
  
  METHODS
  Head and neck oncology clinic.
  
  
  METHODS
  Those receiving surgical therapy for PTC at the University of Utah.
  
  
  METHODS
  Tumor characteristics of patients with central vs lateral nodal metastatic disease in PTC.
  
  
  RESULTS
  Two hundred one patients with PTC met inclusion criteria. There were 136 females (67.7%), and the mean age was 44.8 years. Histologic subtypes included 68 follicular variants of PTC, 111 conventional variants of PTC, and 22 patients with both follicular and conventional PTC variants. Metastatic nodal disease was confirmed histologically in 81 patients (40.3%): 42 with central nodal disease only (20.9%), 10 with lateral disease only (5.0%), and 29 with both central and lateral nodal disease (14.4%). Positive lateral compartment nodal metastasis correlated with distant metastases (P < .01), extrathyroid extension (P < .05), histologic subtype (conventional PTC greater than follicular variant PTC) (P < .05), and tumor location within the thyroid lobe (P < .01). Tumors involving the superior aspect of the thyroid lobe were more likely to be associated with metastasis to the lateral cervical lymph nodes (P < .01), and 76.9% of patients with lateral cervical lymph node disease had involvement of the superior aspect of the lobe. Thyroid microcarcinomas were not associated with lateral cervical compartments in this study.
  
  
  CONCLUSIONS
  The intrathyroidal location of PTC predicts the pattern of nodal spread. Therefore, patients with PTC involving the superior aspect of the lobe should undergo specific imaging evaluation of the lateral neck compartments to determine the need for lateral compartment neck dissection.
authors: Division of Otolaryngology, University of Utah Health Sciences Center, 50 N Medical Drive, Salt Lake City, UT 84132, USA. jason.hunt@hsc.utah.edu
authors: Jason P
authors: JP
authors: Hunt
authors: Luke O
authors: LO
authors: Buchmann
authors: Libo
authors: L
authors: Wang
authors: Dev
authors: D
authors: Abraham
mesh_terms: D000328:Adult; D002291:Carcinoma, Papillary / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D018450:Disease Progression; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008297:Male; D009333:Neck; D011379:Prognosis; D012307:Risk Factors; D013964:Thyroid Neoplasms / Q000473:pathology* / Q000601:surgery