This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elbow injuries, Subject name: Orthopaedics
Supracondylar fracture is usually caused by 
Select and explain. 
A. Hyperflexion injury, B. Axial rotation, C. Extension injury, D. Hyperextension injury
D: Hyperextension injury
Answer: D: Hyperextension injury 
Explanation: supracondylar fracture of the humerus is the most serious fracture in childhood. Mechanism: The fracture is caused by a fall on an outstretched hand.As hand strikes the ground the elbow is forced into hyperextension resulting in fracture of humerus above the condyles. Ref: Essential Ohopaedics, Maheswari & Mhaskar, Edition 5, Page no: 97