Cancer risk among patients with congenital heart defects: a nationwide follow-up study

We aimed to assess cancer risk in congenital heart defect patients, with and without Down's syndrome, compared with the general population.We identified all patients born and diagnosed with congenital heart defects from 1977 to 2008 using the Danish National Registry of Patients, covering all Danish hospitals. We compared cancer incidence in the congenital heart defect cohort with that expected in the general population (∼5.5 million) using the...