Final answer:
A femoral hernia occurs in the femoral triangle region, specifically through the femoral canal adjacent to the femoral vein.
Step-by-step explanation:
A femoral hernia occurs when there is a protrusion of tissue into the region where the femoral artery, vein, and nerve exit the abdomen and pass into the thigh, an area known as the femoral triangle. This triangle is formed at the junction between the hip and the leg and contains not just the femoral blood vessels, but also the pectineus muscle, and deep inguinal lymph nodes. The hernia specifically protrudes through the femoral canal, which is a small passage just medial to the femoral vein. It is important to note that this canal is in the vicinity of the femoral circumflex vein, which forms a loop around the femur just inferior to the trochanters and drains blood from the areas around the head and neck of the femur.