Vascular lacuna
The vascular lacuna (Latin: lacuna vasorum (retroinguinalis)) is the medial compartment beneath the inguinal ligament.[1] It is separated from the lateral muscular lacuna by the iliopectineal arch.[1][2] It gives passage to the femoral vessels,[1] lymph vessels and lymph nodes.
The lacunar ligament can be a site of entrapment for femoral hernias.[2]