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 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 been having 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 investigations are required to confirm a diagnosis of juvenile idiopathic arthritis (JIA)?

Select the SINGLE most appropriate option from the list below. Select ONE option only.