The mechanism of development of Morton’s neuroma

The mechanism of development of Morton’s neuroma is not well understood, but a number of hypotheses have been proposed. When studying the morphological material, it was concluded that, with this pathology, a thickening occurs on the tarsal tibial nerve, and the researcher believed that this is not a true neuroma, but a pseudoneuroma similar to that which develops in the trunk of the median nerve above its compression site carpal tunnel syndrome. Later, changes that ranged from thickening of the wall to complete obliteration of the lumen of the artery supplying the nerve and adjacent tissues in this area of the foot were described, the conclusion about the ischemic nature of the pathological process was made. At present, it is believed that the starting moment is repeated, multiple microtraumas and nerve compression, which passes between the 3rd and 4th metatarsal bones, as a result of which the transversal interlumbus ligament is thickened, the separation
its on fiber and the formation of edema. The so-called pathological interlaryus ligament of the foot leads to constant compression and displacement of the medial plantar nerve and its accompanying vessels, causing its ischemia. Modern studies have shown that the average size of neuroma is 0.95–1.45 cm in length, and 0.15–0.65 cm in width, that is, it is an elongated, spindle-shaped formation.

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