11th August 2020

A 78-year-old man with a past medical history of ischaemic heart disease presents with bilateral leg pain

A 78-year-old man with a past medical history of ischaemic heart disease presents with bilateral leg pain on exercise. On examination, there is a painful ulcer on the base of his big toe. 

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