An unusual late presentation of a congenital diaphragmatic hernia.

An unusual and late-presenting case of left Bochdalek diaphragmatic hernia is presented to highlight the fact that the timing and mechanism of presentation of the hernia remains obscure. In this case there were two previous admissions, initially for a left upper lobe lobectomy for congenital lobar emphysema and a subsequent admission for bronchiolitis. He then presented at the age of nine months, with acute respiratory distress and was diagnosed to have a left diaphragmatic hernia. This is the first case of a late- presenting congenital diaphragmatic hernia reported in association with a previous ipsilateral lobectomy for congenital lobar emphysema. A brief review of late -presenting congenital diaphragmatic hernias is given and an alternative theory is proposed for the mechanism of late presentation.