{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T01:48:51Z","timestamp":1784771331793,"version":"3.55.0"},"reference-count":72,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,1,1]]},"abstract":"<jats:sec>\n                    <jats:title>OBJECTIVE<\/jats:title>\n                    <jats:p>Resection of common peroneal nerve (CPN) schwannomas is generally believed to be associated with a high risk of postoperative deficit, especially the chance for development of a foot drop. The goal of this study was to investigate the surgical results for resection of schwannomas from the CPN around the knee and specifically the chance of developing a postoperative motor deficit.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>Data from 36 patients with sporadic schwannomas and 8 patients with schwannomatosis (12 schwannomas total) treated at two centers were retrospectively analyzed. For sporadic cases, different locations around the knee were compared (i.e., proximal to the fibular head [FH], at the FH, and distal to the FH), taking into account the preoperative duration of symptoms, size at presentation, and surgical results of resection. The literature was systematically reviewed for reported cases by searching the PubMed and Embase databases.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>A total of 24 schwannomas proximal to the FH were surgically treated: 11 at the FH, and 13 distal to the FH. For the entire cohort, the mean size of CPN schwannomas distal to the FH at presentation was smaller (1.4 \u00d7 1.8 cm) compared with those proximal to (2.0 \u00d7 2.2 cm) and at (2.2 \u00d7 2.3 cm) the FH, although these differences were not statistically significant. The mean preoperative duration of symptoms was slightly longer for schwannomas distal to the FH (35 months) than for those proximal to the FH (21 months) and at the FH (27 months); however, this difference was not significant. Postoperative deficits occurred in 3 sporadic cases: 2 patients with temporary weakness (Medical Research Council grade 4) that completely resolved within several months and 1 patient who had previously undergone surgery elsewhere and presented with deficits and in whom weakness increased after resection. Improvement in preoperative deficits was observed in 1 patient with extensor hallucis longus muscle paralysis that completely recovered. One patient with schwannomatosis developed muscle weakness after resection of a plexiform schwannoma. A systematic review of 21 previously reported cases in the literature showed that larger CPN schwannomas (&gt; 5 cm) were more likely to result in permanent motor deficits.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS<\/jats:title>\n                    <jats:p>This retrospective study of 44 patients shows that peroneal nerve schwannomas around the knee can be safely removed with a low risk of deficits. The systematic review of the literature suggests that larger schwannomas are more likely to result in permanent deficit. In the authors\u2019 opinion, CPN schwannomas can best be resected, preferably when the lesion is relatively small.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2025.5.jns25705","type":"journal-article","created":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T01:36:47Z","timestamp":1759541807000},"page":"217-227","source":"Crossref","is-referenced-by-count":1,"title":["Common peroneal nerve schwannomas around the knee: a surgical case series of 44 patients and systematic review of the literature"],"prefix":"10.3171","volume":"144","author":[{"given":"Godard C. W.","family":"de Ruiter","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Haaglanden Medical Center, The Hague, The Netherlands;"},{"name":"Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kirsten M.","family":"Hayford","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas F. H.","family":"Vissers","sequence":"additional","affiliation":[{"name":"Medical Library, Haaglanden Medical Center, The Hague, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert J.","family":"Spinner","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota; and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"1","key":"b1","series-title":"Oper Neurosurg (Hagerstown)","first-page":"60","article-title":"Go for the gold: a \"plane\" and simple technique for resecting benign peripheral nerve sheath tumors","volume":"18","author":"Stone JJ","year":"2020","unstructured":"Stone JJ, Spinner RJ. Go for the gold: a \"plane\" and simple technique for resecting benign peripheral nerve sheath tumors. Oper Neurosurg (Hagerstown). 2020;18(1):60\u201368."},{"key":"b2","series-title":"World Neurosurg","first-page":"e427","article-title":"Long-term follow-up with MRI scans after enucleation of peripheral nerve schwannomas: results from a single-center case series","volume":"189","author":"Ten Hove FL","year":"2024","unstructured":"Ten Hove FL, Ciggaar IA, Coerkamp EG, Kornaat PR, de Ruiter GCW. Long-term follow-up with MRI scans after enucleation of peripheral nerve schwannomas: results from a single-center case series. World Neurosurg. 2024;189:e427\u2013e434."},{"issue":"8","key":"b3","series-title":"Int Orthop","first-page":"1721","article-title":"Surgical outcome of schwannomas arising from major peripheral nerves in the lower limb","volume":"36","author":"Kim SM","year":"2012","unstructured":"Kim SM, Seo SW, Lee JY, Sung KS. Surgical outcome of schwannomas arising from major peripheral nerves in the lower limb. Int Orthop. 2012;36(8):1721\u20131725."},{"issue":"2","key":"b4","series-title":"J Neurosurg","first-page":"246","article-title":"A series of 397 peripheral neural sheath tumors: 30-year experience at Louisiana State University Health Sciences Center","volume":"102","author":"Kim DH","year":"2005","unstructured":"Kim DH, Murovic JA, Tiel RL, Moes G, Kline DG. A series of 397 peripheral neural sheath tumors: 30-year experience at Louisiana State University Health Sciences Center. J Neurosurg. 2005;102(2):246\u2013255."},{"issue":"1","key":"b5","series-title":"Acta Neurochir (Wien)","first-page":"173","article-title":"Advantages of intra-capsular micro-enucleation of schwannoma arising from extremities","volume":"154","author":"Date R","year":"2012","unstructured":"Date R, Muramatsu K, Ihara K, Taguchi T. Advantages of intra-capsular micro-enucleation of schwannoma arising from extremities. Acta Neurochir (Wien). 2012;154(1):173\u2013178."},{"issue":"3","key":"b6","series-title":"Ann Plast Surg","first-page":"296","article-title":"Long-term follow-up of intracapsular schwannoma excision","volume":"82","author":"Niepel AL","year":"2019","unstructured":"Niepel AL, Steinkellner L, Sokullu F, Hellekes D, Komurcu F. Long-term follow-up of intracapsular schwannoma excision. Ann Plast Surg. 2019;82(3):296\u2013298."},{"issue":"3","key":"b7","series-title":"J Bone Joint Surg Br","first-page":"382","article-title":"Benign solitary schwannomas: a review of 234 cases","volume":"89","author":"Knight DM","year":"2007","unstructured":"Knight DM, Birch R, Pringle J. Benign solitary schwannomas: a review of 234 cases. J Bone Joint Surg Br. 2007;89(3):382\u2013387."},{"issue":"6","key":"b8","series-title":"Ned Tijdschr Geneeskd","first-page":"312","article-title":"Een zwelling in de knieholte, niet veroorzaakt door een Baker-cyste, maar door een zenuwschedetumor","volume":"149","author":"de Jonge M","year":"2005","unstructured":"de Jonge M, Deutman R, van Raay JJAM. Een zwelling in de knieholte, niet veroorzaakt door een Baker-cyste, maar door een zenuwschedetumor. Ned Tijdschr Geneeskd. 2005;149(6):312\u2013316."},{"key":"b9","series-title":"BMJ","first-page":"n71","article-title":"The PRISMA 2020 statement: an updated guideline for reporting systematic reviews","volume":"372","author":"Page MJ","year":"2021","unstructured":"Page MJ, McKenzie JE, Bossuyt PM,  The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. 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An unusual case of a giant schwannoma of the common peroneal nerve with duration of twenty years. Curr Probl Cancer Case Rep. 2021;3:100061."},{"issue":"1","key":"b15","series-title":"J Musculoskelet Neuronal Interact","first-page":"87","article-title":"Schwannomas of the peroneal nerves: clinical and functional results of surgical treatment","volume":"22","author":"Andreani L","year":"2022","unstructured":"Andreani L, Ipponi E, Ruinato DA, De Franco S, D\u2019Arienzo A, Capanna R. Schwannomas of the peroneal nerves: clinical and functional results of surgical treatment. J Musculoskelet Neuronal Interact. 2022;22(1):87\u201392."},{"key":"b16","series-title":"Surg Neurol Int","first-page":"413","article-title":"The effect of ozone injection within a common peroneal nerve schwannoma: a mistreatment due to a misdiagnosis","volume":"11","author":"Vetrano IG","year":"2020","unstructured":"Vetrano IG, Acerbi F, Marucci G, Nazzi V. The effect of ozone injection within a common peroneal nerve schwannoma: a mistreatment due to a misdiagnosis. Surg Neurol Int. 2020;11:413."},{"issue":"2","key":"b17","series-title":"J Surg Academia","first-page":"24","article-title":"Schwannoma of the common peroneal nerve\u2014a rare incidence","volume":"7","author":"Levin TJA","year":"2017","unstructured":"Levin TJA, Rhani SA, Hisam A. Schwannoma of the common peroneal nerve\u2014a rare incidence. J Surg Academia. 2017;7(2):24\u201327."},{"issue":"8","key":"b18","series-title":"PM R","first-page":"932","article-title":"Unveiling a common peroneal nerve schwannoma: an ultrasonographic approach to a posterolateral knee mass","volume":"16","author":"Yalcinkaya B","year":"2024","unstructured":"Yalcinkaya B, Colak AF, Hanci T,  Unveiling a common peroneal nerve schwannoma: an ultrasonographic approach to a posterolateral knee mass. PM R. 2024;16(8):932\u2013934."},{"issue":"8-9","key":"b19","series-title":"Rev Neurol (Paris)","first-page":"866","article-title":"Syndrome de paralysie p\u00e9roni\u00e8re r\u00e9l\u00e9vant un schwannome du sciatique poplit\u00e9 externe au col du p\u00e9ron\u00e9","volume":"162","author":"Rafai MA","year":"2006","unstructured":"Rafai MA, El Otmani H, Rafai M,  Syndrome de paralysie p\u00e9roni\u00e8re r\u00e9l\u00e9vant un schwannome du sciatique poplit\u00e9 externe au col du p\u00e9ron\u00e9. Rev Neurol (Paris). 2006;162(8-9):866\u2013868."},{"key":"b20","series-title":"BMJ Case Rep","first-page":"bcr-2017","article-title":"Management and patients perspective regarding a common peroneal nerve schwannoma: a rare cause of lower leg pain in a young individual","volume":"2017","author":"van Zantvoort AP","year":"2017","unstructured":"van Zantvoort AP, Cuppen P, Scheltinga MR. 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