Wednesday 1 August 2012
Morton’s metatarsalgia, Morton’s neuralgia, plantar neuroma and intermetatarsal neuroma
Definitinon: Morton’s neuroma is a benign neuroma of an intermetatarsal plantar nerve, most commonly of the second and third intermetatarsal spaces (between 2nd-3rd and 3rd-4th metatarsal heads).
This problem is characterised by pain and/or numbness, sometimes relieved by removing footwear.
Despite the name, the condition was first correctly described by a chiropodist named Durlacher, and although it is labeled a "neuroma", many sources do not consider it a true tumor, but rather a perineural fibroma (fibrous tissue formation around nerve tissue).
Microscopically, the affected nerve is markedly distorted, with extensive concentric perineural fibrosis. The arterioles are thickened and occlusion by thrombi are occasionally present.