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Timir Banerjee and Dexter D. Koons

P aresthesias from peripheral nerve involvement are common. In approximately 25% of the cases, a history of local trauma is reported. Most sites of compression are well recognized. 2–4 We are presenting two cases of entrapment neuropathy of the superficial peroneal nerve in the distal part of the leg, a site rarely recognized. Case Reports Case 1 This 54-year-old man was admitted with a history of pain near the left ankle and the lateral aspect of the left leg for about 1 year. The pain was precipitated by twisting the ankle, and was particularly

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Lynda J. S. Yang, Vishal C. Gala and John E. McGillicuddy

E ntrapment neuropathies are common clinical entities encountered in everyday neurosurgical practice. Among the most prevalent are median nerve entrapment at the wrist and ulnar nerve entrapment at the elbow. Other nerve entrapments and their attendant syndromes pose more difficult diagnostic challenges and may often be confused with more common clinical conditions. In this report, we describe a case of superficial peroneal nerve syndrome, a relatively rare and unusual nerve entrapment disease. Case Report History. This 22-year-old man

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Dosang Cho, Kriangsak Saetia, Sangkook Lee, David G. Kline and Daniel H. Kim

C ommon peroneal nerve palsy is a debilitating complication, and its incidence due to sports-related knee injury has been reported to be as high as 50%. 6 The mechanism for peroneal nerve injury as a group includes laceration, stretch/contusion, entrapments, iatrogenic, compression, or gunshot wounds. However, peroneal nerve injuries caused by sports are found to be frequently associated with severe ligamentous knee injuries. Most of the peroneal nerve injuries sustained by players come under the category of stretch/contusion injuries. The occurrence of

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Clayton Haldeman and Amgad Hanna

Neurofibromas are benign tumors composed of different cell types from the peripheral nervous system. Neurofibromas infiltrate between nerve fascicles and do not have a discrete capsule. On MRI, they are T1 hypointense or isointense, T2 hyperintense, often with a “target sign,” and contrast enhancing. The video shows gross-total resection of a peroneal nerve neurofibroma presenting as a painful mass in the popliteal fossa. Incisions across a skin crease can be either oblique or zigzag, but never perpendicular to it. It is also key to expose normal nerve proximal and distal to the tumor. The patient had a good functional outcome.

The video can be found here: https://youtu.be/G74Zoa1Y2JM.

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Frans S. S. Leijten, Willem-Frans Arts and Julien B. C. M. Puylaert

their being extra-articular embryonic synovial remnants. 7 Nerve ganglion cysts give rise to motor dysfunction and pain due to compression. Their most frequent site by far is the peroneal nerve. 5 Differential diagnoses include “crossed-leg palsy,” mononeuritis, and neurofibroma. It is difficult to make a reliable clinical diagnosis, because there may not be a palpable mass. 1, 6 We report a patient in whom the diagnosis was made preoperatively by means of ultrasound. Case Report This 12-year-old boy was referred to our neurological department because of

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mononeuropathy in a peripheral nerve. The authors describe the clinical presentation, magnetic resonance (MR) neurography characteristics, and pathological characteristics of a perineurioma involving the peroneal nerve. Although there has been much debate surrounding the cause of this lesion, a literature review supports the argument that this is a neoplastic lesion, best referred to as intraneural perineurioma. Surgical management includes excision to prevent progression of palsy and placement of a nerve graft if clinically indicated. A 28-year-old woman presented with a 2

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Ganglion of the peroneal nerve

Report of two cases

Cully A. Cobb III and Richard H. Moiel

anterior aspect of his ankle was numb. He was placed in a dorsiflexion foot brace in the expectation that his nerve function would improve. However, on reevaluation, the peroneal palsy continued, and an electromyogram (EMG) showed complete degeneration of the deep peroneal nerve with no response to stimulation. He had no history of trauma and no family history of nerve lesions. Examination On admission, left anterior tibial atrophy was present and the patient was unable to dorsiflex his left foot or toes. Hypalgesia was present over the dorsal web between the first

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Annie S. Dubuisson and Achille Stevenaert

P eroneal nerve neuropathy can be induced by several conditions, such as mononeuritis, external compressive neuropathy, and tumors. Intraneural synovial cyst of the peroneal nerve, another possible cause, has been described in single case reports or in small series of two or three cases. In the current report, we recount our experience with an additional case of peroneal nerve neuropathy. The case is of particular interest with regard to its etiology, and to the value of using ultrasonography (US) and, particularly, magnetic resonance (MR) imaging for specific

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Thomas J. Wilson, Grant M. Kleiber, Ryan M. Nunley, Susan E. Mackinnon and Robert J. Spinner

distally for the tibial division. 4 , 8 In addition to peroneal-predominant sciatic nerve palsy being more common than the tibial-predominant type, peroneal-related symptoms and deficits account for the majority of the morbidity associated with sciatic nerve injuries after THA. For these reasons, recovery of peroneal nerve function is the focus. For those patients who do not spontaneously recover, some centers have performed sciatic neurolysis for both treatment of neuropathic pain and in an effort to foster motor recovery. The results are limited to small series but in

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Douglas B. Humphreys, Christine B. Novak and Susan E. Mackinnon

P eroneal nerve compression neuropathy is a well-recognized entity that results in a variety of symptoms, including foot drop due to paralysis of the affected musculature as well as sensory disturbances over the lateral side of the lower extremity extending onto the dorsum of the foot. The diagnosis of compression neuropathy is made based on an understanding of the anatomy of the peroneal nerve. Surgical decompression of the common peroneal nerve at the fibular head has been described but results of that decompression procedure are rarely found in the