What skeletal site is predominantly trabecular bone?

• A. Proximal femur
• B. Calcaneus
• C. Distal forearm
• D. All of the above

Answer: (D)

The correct answer highlights that each of the specified skeletal sites possesses a significant amount of trabecular bone, which is essential for understanding bone density measurements and skeletal health.

The proximal femur is rich in trabecular bone and plays a crucial role in overall joint stability and mobility, making it a common site for assessing bone density, particularly in relation to osteoporosis and fracture risk.

The calcaneus, or heel bone, is another site where trabecular bone is prominent. This bone's structure is crucial for absorbing impact and distributing forces during weight-bearing activities, making it an important consideration in bone densitometry.

The distal forearm, often examined for its trabecular content, is particularly susceptible to fractures due to osteoporosis. The trabecular bone in this area serves as a structural support that carries weight and withstands stress.

Given that all these locations are recognized for their significant trabecular components, the answer correctly encompasses them all, reinforcing the importance of trabecular bone in various skeletal assessments and the evaluation of conditions like osteoporosis. This comprehensive view underscores that all listed sites are important in understanding bone density and health.