This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Rugger jersey spine in CRF is due to - 
Select and explain. 
A. Osteomalacia, B. Trauma, C. Hyperparathyroidism, D. Aluminium osteodystrophy
C: Hyperparathyroidism
Answer: C: Hyperparathyroidism 
Explanation: A common finding in secondary hyperthyroidism associated with renal osteodystrophy is the osteosclerosis resulting in typical appearance of the vertebral bodies as seen in the rugger - jersy spine.