4th June 2021

A 74-year-old man presents to his GP with a painful, swollen left knee

A 74-year-old man presents to his GP with a painful, swollen left knee for the last 24 hours. He has a history of hypertension and osteoarthritis in the same knee. This is the first time that he has experienced pain like this in his knee. He feels well in himself and has not had any fevers.

Which is the LEAST likely diagnosis?

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