title: Cancer risk in persons with oral cleft--a population-based study of 8,093 cases.
abstract: The authors conducted a nationwide study of the occurrence of cancer among 8,093 Danish oral cleft cases born in 1936 through 1998 and followed in the Danish Cancer Registry from 1968 through 1998, a total of 175,863 person-years, to assess a possible association between cancer and oral clefts. Observed and expected numbers of cancers among oral cleft cases were summarized as the overall and as 52 site-specific standardized incidence ratios. The expected overall number of all cancers was 131, but 140 incident cancers were found, corresponding to a standardized incidence ratio of 1.07 (95% confidence interval (CI): 0.90, 1.26). Analyses of the 52 sites for all oral cleft cases and analyses stratified for three cleft subgroups and the two sexes revealed only a few significant associations: an increased occurrence of breast cancer among females born with cleft lip and/or cleft palate (standardized incidence ratio (SIR) = 1.52, 95% CI: 1.05, 2.14), primary brain cancer among females born with cleft palate (SIR = 3.11, 95% CI: 1.14, 6.78), and primary lung cancer among males born with both cleft lip and cleft palate (SIR = 2.49, 95% CI: 1.00, 5.14). The results do not provide evidence for an increased overall cancer risk for individuals born with oral clefts.
authors.affiliation: Center for the Prevention of Congenital Malformations, Institute of Public Health, University of Southern Denmark, Odense, Denmark. cbille@health.sdu.dk
authors.forename: Camilla
authors.initials: C
authors.lastname: Bille
authors.forename: Jeanette Falck
authors.initials: JF
authors.lastname: Winther
authors.forename: Andrea
authors.initials: A
authors.lastname: Bautz
authors.forename: Jeffrey C
authors.initials: JC
authors.lastname: Murray
authors.forename: Jørn
authors.initials: J
authors.lastname: Olsen
authors.forename: Kaare
authors.initials: K
authors.lastname: Christensen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002971:Cleft Lip / Q000150:complications*; D002972:Cleft Palate / Q000150:complications*; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology*; D012042:Registries / Q000706:statistics & numerical data*; D012307:Risk Factors