Presentation of diaphragmatic herniae during pregnancy and labour.

We report two cases of pregnancy-related diaphragmatic hernia. Case one was a 36-year-old woman who presented in her ninth pregnancy, after eight vaginal deliveries. Eight months after a stab wound to the chest, she developed persistent vomiting. The diagnosis was made by chest X-ray after a contralateral central line had been inserted for parenteral nutrition. A 6 x 4 cm stab-induce defect in the diaphragm was repaired. Close by was a second healed diaphragmatic stab wound. Case two involved a 32-year-old woman with a history of repaired childhood diaphragmatic hernia. She developed atypical shoulder and precordial chest pain during labour. Delivery was achieved by the vaginal route, ventouse-assisted. Persistent pain and vomiting led to insertion of a nasogastric tube and the diagnosis was made on the subsequent chest X-ray. The omentum was very adherent to the lung and could only be mobilised via a thoracotomy, at which significant air leaks occurred but settled rapidly. The difficulties of diagnosis are discussed along with the embryology, mechanisms and management of this condition.