14th September 2020

A 15-year-old female describes pain in her left knee along with intermittent swelling

A 15-year-old female describes pain in her left knee along with intermittent swelling and locking when walking. She denies any recent trauma to the joint. On physical examination, there is a mild effusion in the knee. 

For the patient above, please select the SINGLE most likely diagnosis. Select ONE option from the list above.