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Most tumors commonly arise in the skeletal system, which are the classic ES\/PNET and occasionally occur in the soft tissue of extraskeletal sites, which are named extraskeletal Ewing\u2019s sarcomas (EES\/PNET). This study reports a case of a 28-year-old man with primary EES\/PNET of the penis.<\/jats:p>","DOI":"10.1177\/1066896912454565","type":"journal-article","created":{"date-parts":[[2012,7,25]],"date-time":"2012-07-25T22:49:39Z","timestamp":1343256579000},"page":"63-67","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":11,"title":["Primary Ewing\u2019s Sarcoma\/Primitive Neuroectodermal Tumor (ES\/PNET) of the Penis"],"prefix":"10.1177","volume":"21","author":[{"given":"Zheng","family":"Ma","sequence":"first","affiliation":[{"name":"St Luke\u2019s-Roosevelt Hospital Center, New York, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fadi","family":"Brimo","sequence":"additional","affiliation":[{"name":"McGill University Health Center, Montreal General Hospital, Montreal, Quebec, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nebras","family":"Zeizafoun","sequence":"additional","affiliation":[{"name":"St Luke\u2019s-Roosevelt Hospital Center, New York, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2012,7,25]]},"reference":[{"key":"bibr1-1066896912454565","doi-asserted-by":"publisher","DOI":"10.1097\/00005392-199907000-00041"},{"key":"bibr2-1066896912454565","doi-asserted-by":"publisher","DOI":"10.1007\/s11255-007-9202-1"},{"key":"bibr3-1066896912454565","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2007.07.031"},{"key":"bibr4-1066896912454565","first-page":"255","volume":"14","author":"Liu GH","year":"2008","journal-title":"Zhonghua Nan Ke Xue"},{"key":"bibr5-1066896912454565","doi-asserted-by":"publisher","DOI":"10.1002\/cncr.25840"},{"key":"bibr6-1066896912454565","doi-asserted-by":"publisher","DOI":"10.1016\/j.clon.2010.02.010"},{"key":"bibr7-1066896912454565","first-page":"298","volume-title":"WHO Classification of Tumours. 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