This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
Chronic recurrent multifocal osteomyelitis is seen in: 
Select and explain. 
A. Werner's syndrome, B. Waenberg's syndrome, C. SAPHO syndrome, D. All of the above
C: SAPHO syndrome
Answer: C: SAPHO syndrome 
Explanation: Chronic recurrent multifocal osteomyelitis Werner syndrome Waenberg's syndrome SAPHO syndrome Progeria Auto-immune disease Hereditary condition Mononeuropathy Associated - HLA B27 Not associated with osteomyelitis Synovitis acne pustulosis hyperostosis osteitis Premature aging increased risk of cancer entrapment of the superficial branch of the radial nerve Rx - DMARDS + steroids + NSAIDS.