Tags: Anatomical Structure.
The lumbar triangle can refer to either the inferior lumbar (Petit) triangle which lies superficially or the superior lumbar (Grynfeltt) triangle which is deep and superior to the inferior triangle. Of the two the superior triangle is the more consistently found in cadavers and is more commonly the site of herniation; however the inferior lumbar triangle is often simply called the lumbar triangle perhaps owing to its more superficial location and ease in demonstration.
