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
A 4-year-old girl is brought to the emergency department after falling about from a chair and injuring her right leg. During the past 2 years, she has had two long bone fractures. She is at the 5th percentile for height and 20th percentile for weight. Her right lower leg is diffusely erythematous. The patient withdraws and yells when her lower leg is touched. A photograph of her face is shown. An x-ray of the right lower leg shows a transverse mid-tibial fracture with diffusely decreased bone density. Which of the following is the most likely cause of this patient's symptoms?
assistant
Type 1 collagen defect