Which structure forms the medial border of the femoral canal?

The lacunar ligament forms the medial border of the femoral canal. This anatomical structure is a small, triangular band of fibrous tissue located at the medial aspect of the femoral sheath. It arises from the inguinal ligament and attaches to the pectineal line of the pubic bone. By defining the medial border of the femoral canal, the lacunar ligament plays an important role in the anatomy of the groin region.

The femoral canal is one of three compartments of the femoral sheath, which also contains the femoral artery and femoral vein. Understanding the boundaries of the femoral canal is essential, particularly in surgical contexts, where hernias can occur through this area. The other structures listed, such as the inguinal ligament and the pectineal ligament, have their roles in the anatomy of the region but do not define the medial boundary of the femoral canal specifically. The femoral vein, while located in the femoral sheath, forms the lateral border of the canal, not the medial border.