title: Characteristics of patients with primary lung cancer diagnosed at age of 50 years or younger.
abstract: We examined the extrinsic and intrinsic characteristics of patients with primary lung cancer diagnosed at early ages and compared them with those of older patients. Significant differences in gender distribution and histologic cell type were present. Cigarette smoking was an important etiologic factor in both groups.
authors.affiliation: Centre for Agricultural Medicine, University of Saskatchewan, Saskatoon, Canada.
authors.forename: H H
authors.initials: HH
authors.lastname: McDuffie
authors.forename: D J
authors.initials: DJ
authors.lastname: Klaassen
authors.forename: J A
authors.initials: JA
authors.lastname: Dosman
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology / Q000473:pathology; D000367:Age Factors; D018288:Carcinoma, Small Cell / Q000209:etiology / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000473:pathology; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology* / Q000473:pathology; D008297:Male; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology