Osteomyelitis (pediatrics) Quiz: Ace Your Exams
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A 6-year-old boy is brought to the emergency department with a four-day history of fever and refusal to bear weight on his left leg. He has been increasingly irritable and reporting leg pain, even at rest. He has no history of recent trauma. The patient's temperature is 38°C (100.4°F), blood pressure is 100/60 mmHg, heart rate is 116 beats per minute, respiratory rate is 24 breaths per minute, and oxygen saturation is 98% on room air. Body mass index (BMI) is at the 35th percentile. On examination, the left thigh is swollen, warm, and tender along the femur, with no observable effusion in the right knee or thigh. The child refuses to move the leg. Laboratory results are shown below. Magnetic resonance imaging (MRI) of the left leg is ordered. Which of the following imaging findings is most likely to be seen in this patient?
| Laboratory Test | Result |
| White blood cell count | 18,500/mm³ |
| Hemoglobin | 11.8 g/dL |
| Platelets | 420,000/mm³ |
| C-reactive protein (CRP) | 12.5 mg/dL |
| Erythrocyte sedimentation rate (ESR) | 65 mm/hr |
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