A bochdalek hernia is a form of congenital diaphragmatic hernia. They occur posteriorly and are due to a defect in the posterior attachment of the diaphragm when there is a failure of pleuroperitoneal membrane closure in utero. Prolapse of retroperitoneal structures may occur through the defect.
Large hernias typically seen in infants are mostly left-sided. In adults, Bochdalek hernia is extremely rare, often incidentally discovered as a posterior diaphragmatic hernia (0.17% of patients having an abdominal CT). We present a left-sided Bochdalek hernia case in an adult male patient and discuss the literature.