Piriform and trochanteric fossae. A drawing mismatch or a terminology error? A review.

The current literature indicates that the standard starting point for intramedullary nailing is the piriform fossa. The accuracy of the entry point for anterograde femoral intramedullary nailing between published texts and relevant illustrations was recorded. The piriform fossa is the site of insertion of the piriform tendon and represents a small, shallow depression located on the tip of the greater trochanter. The trochanteric fossa is a deep depression on the inner surface of the greater trochanter, and in the vast majority of the published data is indicated incorrectly as "piriform fossa". As a result of either a recurrent drawing mismatch or a terminology error, the correct entry point for anterograde femoral intramedullary nailing is confusing and should be indicated in the current literature. The trochanteric fossa appears to be the standard entry point that most surgeons recommend.