1 MCQs in Anatomy for NEET PG
A 42-year-old woman with long-standing rheumatoid arthritis presents for elective knee replacement surgery. Pre-operative lateral cervical spine radiograph is obtained. The atlanto-dental interval (marked **C** in the diagram) measures 5 mm. Which of the following best explains the increased measurement and represents the PRIMARY mechanism of atlantoaxial instability in this patient?
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