title: Mucinous Adenocarcinoma of the Salivary Gland: A Review of a Rare Tumor.
abstract: To describe the clinical, demographic, and prognostic features of salivary gland mucinous adenocarcinoma, a rare head and neck malignancy.
  
  
  
  Population-based national cancer registry analysis.
  
  
  
  Academic medical center.
  
  
  
  A review was performed with the National Cancer Database from 1998 to 2012. Demographic, clinical, and survival characteristics were compiled and analyzed. Cox multivariate regression was used to identify predictors of survival. Log-rank tests were used to test survival differences unless otherwise specified.
  
  
  
  A total of 170 cases were identified. The most common site of involvement was the parotid gland. Rates of nodal and distant metastases were 45.9% and 10.6%, respectively. High histologic grade was associated with nodal disease (P < .001) and advanced-stage disease (P = .006). Overall 5- and 10-year survival rates were 60% and 44%, respectively. Multivariate analysis found tumor size ≥2 cm (hazard ratio, 22.6; 95% confidence interval: 4.06-126.09; P < .001) and distant metastases (hazard ratio, 17.6; 95% confidence interval: 3.75-82.68; P < .001) to predict poor outcomes.
  
  
  
  Mucinous adenocarcinoma of the salivary gland is a rare otolaryngic cancer. Regional metastases and advanced stage are more common with high histologic grade. Tumor size and distant metastases negatively influence survival.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA farhood@musc.edu.
authors.forename: Zachary
authors.initials: Z
authors.lastname: Farhood
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA.
authors.forename: Kevin Y
authors.initials: KY
authors.lastname: Zhan
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA.
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Lentsch
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000473:pathology*; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011379:Prognosis; D012042:Registries; D012468:Salivary Gland Neoplasms / Q000473:pathology*; D015996:Survival Rate
keywords: head and neck cancer; mucinous adenocarcinoma; salivary gland tumor