Fig. 2.

A 62-year-old man presented with a wound on the medial aspect of the left hindfoot, sustained one month earlier, with pus discharge and surrounding inflammation. Coronal (a) T1-W and (b) contrast-enhanced T1-W FS MR images of the left hindfoot show an ulcer (white arrows) on the medial aspect of the hindfoot, seen as a soft tissue defect with focal interruption of the cutaneous line. Enhancing granulation tissue is noted at the base of the ulcer and surrounding cellulitis is present (white asterisks), seen as areas of T1-hypointense signal within the subcutaneous tissues, with prominent reticulation and enhancement of subcutaneous fat. Sagittal (c) T1-W, (d) T2-W FS and (e) contrast-enhanced T1-W FS MR images of the left foot show reactive subcutaneous oedema at the dorsum of the foot (arrowheads), which shows low T1-W and high T2-W signals, similar to those for cellulitis. However, no significant enhancement is seen, distinguishing it from cellulitis. Mild cellulitis is noted in the sole (black arrows), with T1 hypointensity, T2 hyperintensity and mild enhancement in the subcutaneous tissues. Increased T2-W signal in the plantar muscles is characteristic of myositis (black asterisks).