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A rare form of presentation of truncus arteriosus in adult

Truncus arteriosus is a rare congenital heart disease with average survival up to 5 weeks, and unrepaired truncus cases surviving into adulthood are very few. For these reasons, the natural history of the unrepaired defect is not very well-known, and is backed by only a handful of such cases that are reported. We report this very rare case of adult survival of an uncorrected truncus arteriosus, with certain aspects of presentation unique and insightful with regards to its natural history.