9th September 2020

A 10-year-old girl presents with back pain and stiffness that is worse in the morning

A 10-year-old girl presents with back pain and stiffness that is worse in the morning and has worsened over the last 6 weeks. Two days ago, she noticed her left big toe was swollen compared to her right toe but does not remember injuring it or any other specific triggers.  She does not have a fever. On examination, you notice shiny, scaly plaques on both her elbows and small dents in her fingernails. What is the most likely diagnosis?

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