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
An 8-year-old boy presents with a limp favoring his right leg. The patient’s mother noticed he had been limping without complaint for the past 6 months. Past medical history is significant for the flu last year. No current medications. All immunizations are up to date. The vital signs include: temperature 37.0°C (98.6°F), blood pressure 100/60 mm Hg, pulse 74/min, respiratory rate 19/min, and oxygen saturation 99% on room air. The body mass index (BMI) is 17.2 kg/m2. On physical examination, the patient is alert and cooperative. A limp favoring the right leg is noted when the patient is walking. There is mild tenderness on deep palpation of the left lumbar region but no erythema, edema, or warmth. There is a decreased range of motion of the left hip. Which of the following is the most likely diagnosis in this patient?
assistant
Legg-Calve-Perthes disease