MRCP2-4733

A 59-year-old man with no permanent residence presents to the Emergency department with difficulty walking. He has a past medical history of alcoholism and type 2 diabetes. The patient reports that his shoes have worn out and due to decreased sensation, he was unaware that he had stepped on a nail. The lesion on his right foot has been present for about three weeks.

What is the next step in assessing his foot injury?