9th September 2020

A 5-year-old girl presents with worsening limp and stiffness in her knees over the last two months

A 5-year-old girl presents with worsening limp and stiffness in her knees over the last two months. The stiffness is worse in the morning upon waking and seems to get better throughout the day.  She does not have any pain. More recently, her father has noticed that she has had daily fevers for the last 2 weeks that seem to settle with paracetamol. On examination, you note that she has a reduced range of motion in her right knee and a salmon coloured rash on her trunk. What is the most likely diagnosis?

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