BACKGROUND: @entity2 ( @entity189 ) is one of the rare histological @entity1149 . Only a few case reports have been published. The knowledge of its characteristics and prognosis in western population is limited. Based on the data of the Surveillance, Epidemiology, and End Results database (SEER), an analysis was performed to fill the gap of our knowledge. METHODS: Characteristics, treatment and outcomes of all pulmonary @entity189 @entity1 was extracted both from the SEER database from 1973 to 2011 using SEER*Stat 8.2.1 statistical analysis was performed using SPSS 16.0 and GraphPad Prism 5. RESULTS: A total of 62 @entity1 with pulmonary @entity189 are identified and analyzed. The median age at diagnosis is 65. Among them, the majority was male (64.4%). Early stage @entity1 account for the largest proportion (67.8%). The median survival of all @entity189 @entity1 is 107 months [95% confidence interval (CI), 67-147]. The 1, 3 and 5 years survival rates of @entity189 are 85.6%, 74.5% and 55.2%. In the comparisons incorporating with other types of @entity2 (LCC), @entity420 ( @entity420 ) and @entity1544 (SQ), the overall survival (OS) of @entity189 is superior to others. Most of the early stage (localized and regional) @entity189 @entity1 (37/45, 82.2%) received surgical resection as the primary treatment. @entity1 older than 65 years predicted a worse prognosis. CONCLUSIONS: Pulmonary @entity189 is a rare pathological @entity2 . In this cohort, most @entity189 cases were male and in early stage. Majority of early stage @entity189 @entity1 have received surgical resection. @entity1 older than 65 years had worse survival. Unfortunately, no other prognostic factor has been identified in our study. In addition, we observed that @entity189 had an ideal prognosis comparing to other types of LCC, @entity420 and SQ. In order to understand pulmonary @entity189 more thoroughly, more cases are required.

XXXX : a Surveillance, Epidemiology, and End Results database analysis.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity1149 :: ('MESH:D002289', 'Disease') :: ['non-small cell lung cancers'] @entity2 :: ('MESH:D008175', 'Disease') :: ['Pulmonary lymphoepithelioma-like carcinoma', 'large cell lung cancer', 'type of lung cancer'] @entity189 :: ('MESH:D002277', 'Disease') :: ['LELC'] @entity1544 :: ('MESH:D018307', 'Disease') :: ['squamous cell lung cancer'] @entity420 :: ('MESH:D000230', 'Disease') :: ['AD', 'adenocarcinoma']
@entity2 :: (MESH:D008175,Disease) :: ['Pulmonary lymphoepithelioma-like carcinoma']
