Fig. 12

Abscess. A 50-year-old diabetic patient, 2 years after amputation of the second digit (including the metatarsal head), presenting with a painless swelling at the region of previous surgery. Short-axis T1-WI (a), fat-suppressed T2-WI (b) and fat-suppressed contrast-enhanced T1-WI (c) demonstrate a collection (long arrow) in the soft tissue between the first and second metatarsal heads, of low SI on T1-WI, high SI on T2-WI and thick rim enhancement (arrowheads). There is increased SI on T2-WI of the adjacent soft tissue and dermis as well as contrast enhancement, corresponding to oedema and cellulitis (short arrow)