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Figure 4d.   Morton neuroma in a 45-year-old woman. (a) Short axis T1-weighted (750/15) MR image shows a 6-mm mass (*) in the interspace between the third and fourth metatarsals at the level of the metatarsal head. (b, c) Short axis fat-suppressed contrast material-enhanced T1-weighted (700/15) MR (b) and power Doppler US (c) images show marked enhancement and increased vascularity of the lesion (*). (d) Photograph of the resected specimen shows the entering plantar digital nerve (arrowheads) and the mass (arrows) distally representing perineural fibrosis.