Structure F is the:

Structure F is the:

• A. Obturator foramen
• B. Ischial tuberosity
• C. Greater trochanter
• D. Lesser trochanter

Answer: (C)

Recognizing the proximal femur landmarks is what this item tests. The structure shown is the greater trochanter, a large bony prominence on the proximal femur just below the hip joint and lateral to the femoral neck. It stands out as the main, easily identifiable bump on standard hip or femur radiographs and serves as a key reference point for positioning and orientation. The other options describe features that aren’t the prominent lateral projection on the proximal femur: the obturator foramen is a pelvic opening, not part of the femur; the ischial tuberosity is a posterior pelvic prominence; the lesser trochanter is a smaller medial projection that isn’t the large lateral bump you’d expect to label as Structure F.

Recognizing the proximal femur landmarks is what this item tests. The structure shown is the greater trochanter, a large bony prominence on the proximal femur just below the hip joint and lateral to the femoral neck. It stands out as the main, easily identifiable bump on standard hip or femur radiographs and serves as a key reference point for positioning and orientation.

The other options describe features that aren’t the prominent lateral projection on the proximal femur: the obturator foramen is a pelvic opening, not part of the femur; the ischial tuberosity is a posterior pelvic prominence; the lesser trochanter is a smaller medial projection that isn’t the large lateral bump you’d expect to label as Structure F.