Pseudohypertrophy of the extensor digitorum brevis in diabetic polyneuropathy

Abstract

Pseudohypertrophy of the extensor digitorum communis muscle. A, In the clinical photograph, the EDB stands out on the proximal dorsolateral foot border (arrow). There are additional findings of chronic diabetic polyneuropathy, including trophic skin changes (xerosis, loss of hair) and mild clawing of the toes. Two select T1-weighted MR images of the left foot (B, long axis, sagittal; C, short axis, axial) demonstrate a well-defined soft tissue structure (arrows) isointense to subcutaneous fat. This is consistent with an enlarged extensor digitorum brevis completely replaced with adipose tissue