There’s Mischief Afoot

ANSWER

The radiograph demonstrates no evidence of an acute fracture or soft-tissue gas to suggest an abscess. Of note, though, within the tibiotalar joint, the patient has bony destruction and settling of the articular surfaces of both the distal tibia and fibula into the talus and calcaneus.

This finding is typically associated with neuropathic arthropathy (also known as a Charcot joint). This pathologic process is typically seen in a weight-bearing joint that develops progressive degeneration from chronic loss of sensation.