Diaphragmatic hernias are sub-divided into two groups: congenital and acquired.

In an asymptomatic case with left-sided diaphragmatic hernia, one should think Bochdalek or traumatic subtypes. In a Bochdalek hernia, the herniating structure could be stomach, intestine, spleen, or kidney. In a traumatic hernia, herniation of stomach, small bowel, omentum, spleen, or kidney is possible.

Herniation of pancreas is a rare condition reported in only a few cases; most of them were hiatal. In this case, asymptomatic herniation of tail of pancreas via the musculotendinous defect is presented.