Structure E is the:

Structure E is the:

• A. Acetabulum
• B. Ischial tuberosity
• C. Greater trochanter
• D. Lesser trochanter

Answer: (D)

The structure shown is the lesser trochanter. This small, conical projection sits on the posteromedial aspect of the proximal femur just below the femoral neck and serves as the attachment point for the iliopsoas muscle. It’s distinct from the greater trochanter, which is a larger prominence on the lateral side of the proximal femur, and from pelvic landmarks like the acetabulum (the hip socket) and the ischial tuberosity (the sit bone on the pelvis). On the radiograph, the small medial bump beneath the neck corresponds to the lesser trochanter, making it the correct identification.

The structure shown is the lesser trochanter. This small, conical projection sits on the posteromedial aspect of the proximal femur just below the femoral neck and serves as the attachment point for the iliopsoas muscle. It’s distinct from the greater trochanter, which is a larger prominence on the lateral side of the proximal femur, and from pelvic landmarks like the acetabulum (the hip socket) and the ischial tuberosity (the sit bone on the pelvis). On the radiograph, the small medial bump beneath the neck corresponds to the lesser trochanter, making it the correct identification.