Imaging of incidental Bochdalek hernia.

Incidental adult Bochdalek hernia is a posterolateral diaphragmatic opening with transit of intra-abdominal contents into the thorax, having been diagnosed while being imaged for another reason. Size and contents are variable. Epidemiological factors and prevalence are controversial. Patients may suffer morbidity and mortality depending on involvement of organs. Diagnosis is made predominantly by routine computed tomographic scan, which is improved by the use of three-dimensional techniques and now-routine multi-detector row technology.