The Journal of foot surgery
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Review Case Reports
Malignant schwannoma of the medial plantar branch of the posterior tibial nerve.
Malignant schwannoma in the foot is extremely rare. The authors present a case involving the medial plantar branch of the posterior tibial nerve in a patient with neurofibromatosis, without previous history of malignant degeneration. Following full excisional biopsy, the diagnosis was made using immunohistochemical studies and electron microscopy. A review of the literature also is presented.
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The authors describe use of the nerve stimulator in conjunction with a percutaneous exploring needle to achieve peripheral blocks accurately and without injuring the nerve. The nerve stimulator allows accurate nerve blocks without causing paresthesiae and the need for additional anesthetic. This technique decreases the possibility of nerve injury.