[Appendix in a left crural herniated position: apropos of a case. Explanation by human ontogenesis].

The authors report about one case of left crural strangulation containing the appendix. The right flexure of the colon is fixed in its usual infrahepatic position. The ascending colon, on the other hand, floats, and the cecum is in a left iliac position. An ontogenic explanation is proposed, on the basis of recent anatomical work, and compared with traditional hypotheses about the evolution of the gastrointestinal tract in relation to the development of the peritoneum.