Morton neuroma is a focal perineural fibrosis of the plantar interdigital nerves.
Morton neuroma: Evaluation with MR imaging performed with contrast enhancement and fat suppression.
We believe that the tumor described in this report and those labeled granular cell traumatic neuroma by Rosso et al are really the same lesion, with the difference that in this patient the persistent tissular injury in the vicinity of lithiasis played the role of a causal, causative, or promoting factor for the development of the tumor, in a similar way, for example, that
Morton neuroma is a mechanically induced lesion that affects women who frequently wear shoes that are not designed for the physiology of the foot.
Surgical pathologists are well acquainted with the morphologic features of schwannomas, neurofibromas, traumatic or Morton neuromas, and ganglion cysts, the most common benign lesions to present as nerve masses.
Common lesions in our database eliminated from further study included 193 schwannomas, neurofibromas, or variants thereof; 105 ganglion cysts; 71 traumatic or Morton neuromas; 30 MPNSTs; and 22 paragangliomas (of which 19 were glomus vagale, tympanicum, jugulare, carotid body, or facial nerve in origin and 3 were from the cauda equina).