title: A comparative population-based analysis of sinonasal diffuse large B-cell and extranodal NK/T-cell lymphomas.
abstract: OBJECTIVE
  Diffuse large B-cell lymphoma (DLBCL) and extranodal natural killer/T-cell lymphoma (ENKTL) are aggressive tumors. ENTKL is very rare in the United States and often affects the nasal cavity and paranasal sinuses; DLBCL, although more common, rarely occurs in these locations. Our study aims to compare incidence and survival of these lymphomas in the sinonasal cavity.
  
  
  METHODS
  Retrospective analysis of the United States National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) registry.
  
  
  METHODS
  The SEER database was searched for patients diagnosed with sinonasal ENKTL and DLBCL between 1973 and 2011. Data analyzed included patient demographics, incidence, treatment modality, and survival.
  
  
  RESULTS
  Three hundred and twenty-eight sinonasal ENKTL (SN-ENKTL) cases and 1,054 sinonasal DLBCL (SN-DLBCL) cases were identified. The mean ages at diagnosis for SN-ENKTL and SN-DLBCL were 51.7 and 67.8 years, respectively (P = 0.0001). Overall 1-, 5-, and 10-year disease-specific survival (DSS) rates for SN-DLBCL were 85.5%, 63.5%, and 44.0%, compared to 66.4%, 30.9%, and 9.2% for SN-ENKTL, respectively (P < 0.0001). For patients matched for stage, age, and treatment modality, the 1-, 5-, and 10-year DSS for the SN-DLBCL group was 94.4%, 72.8%, and 46.8%, respectively, whereas the respective survival rates for the SN-ENKTL group were 77.6%, 38.4%, and 13.9%, respectively (P < 0.0001 at each time interval).
  
  
  CONCLUSIONS
  To our knowledge, this study represents the only population-based comparison between SN-DLBCL and SN-ENKTL. SN-DLBCL has a better prognosis regardless of gender, stage, treatment modality, and age.
  
  
  METHODS
  2b.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Rutgers New Jersey Medical School, Newark, New Jersey, U.S.A.
authors.forename: Pariket M
authors.initials: PM
authors.lastname: Dubal
authors.forename: Rahul
authors.initials: R
authors.lastname: Dutta
authors.forename: Alejandro
authors.initials: A
authors.lastname: Vazquez
authors.forename: Tapan D
authors.initials: TD
authors.lastname: Patel
authors.forename: Soly
authors.initials: S
authors.lastname: Baredes
authors.forename: Jean Anderson
authors.initials: JA
authors.lastname: Eloy
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D054391:Lymphoma, Extranodal NK-T-Cell / Q000175:diagnosis / Q000453:epidemiology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D012189:Retrospective Studies; D018426:SEER Program; D015996:Survival Rate / Q000639:trends; D014481:United States / Q000453:epidemiology; D055815:Young Adult
keywords: DLBCL; ENKTL; SEER; demographic; diffuse large B-cell lymphoma; disease-specific survival; extranodal natural killer/T-cell lymphoma; incidence; sinonasal lymphoma; sinonasal malignancy