Which landmark is identified as Structure E in the hip region?

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

Answer: (D)

The structure labeled E is the lesser trochanter. This small, posteromedial projection sits on the proximal femur just below the neck and serves as the tendon insertion for the iliopsoas muscle, which helps flex the hip. Its location is distinct from other nearby landmarks: the acetabulum is the hip socket on the pelvis, the greater trochanter is a larger lateral prominence on the proximal femur for gluteal muscle attachments, and the ischial tuberosity is a lower, posterior part of the pelvis you sit on. The lesser trochanter’s medial and inferior position on the femur makes it the clear match for Structure E.