What does the lesser trochanter's position indicate about the proximal femur?

• A. The length of the femur
• B. The degree of rotation
• C. The density of the bone
• D. The age of the patient

Answer: (B)

The position of the lesser trochanter is an important anatomical feature in assessing the proximal femur. In imaging studies of the hip, particularly in X-rays and bone densitometry, the orientation and visibility of the lesser trochanter can provide valuable information about the degree of femoral rotation.

If the lesser trochanter is visible or prominently positioned, it typically indicates that the femur is externally rotated. Conversely, if it is obscured or less prominent, the femur may be internally rotated. This is crucial for accurately interpreting images and ensuring that they reflect the true anatomical position of the femur, which aids in the diagnosis and assessment of bone health, especially in conditions like osteoporosis or fractures.

Understanding this relationship enhances diagnostic accuracy in clinical practice, making the degree of rotation an essential consideration when examining proximal femur images.