Pulmonary sarcomatoid carcinoma: An analysis of the National Cancer Database.

7537 Background: Pulmonary sarcomatoid carcinomas (SC) are a grouping of five rare non-small cell lung cancer (NSCLC) subtypes. Small case series suggest that these patients have a poor prognosis. We sought to better define the clinical characteristics and outcomes of SC utilizing the National Cancer Database (NCDB), an oncology outcomes database administered by the American College of Surgeons and the American Cancer Society. Methods: The NCDB lung cancer database was queried from 1998 to 2011 for SC using ICD-O-3 codes. Data were extracted on patient demographics, tumor pathology, treatments, and outcomes. Overall survival (OS) data were available for patients diagnosed from 1998-2006 and co-morbitity data from 2003-2011. The univariate association with covariates between SC and other forms of NSCLC was assessed using Chi-square test or ANOVA, where appropriate. The univariate (UV) and multivariable analysis (MV) with OS were conducted by Cox proportional hazards model and/or log-rank tests. All statist...