system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common cause of Vertebra plana
assistant
The correct answer is  Vertebra plana:

Uniform collapse of a vertebral body into a thin, flat disc.
M/c cause - Eosinophilic granuloma.