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        "resumen" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Presentamos un caso de tumor neuroectod&#233;rmico primitivo originado en el nervio ci&#225;tico&#44; en un paciente con un cuadro cl&#237;nico de ciatalgia intensa desencadenada siempre al sentarse y un abultamiento notable en la regi&#243;n gl&#250;tea derecha&#46; En la intervenci&#243;n quir&#250;rgica&#44; se identific&#243; en el tronco del nervio ci&#225;tico&#44; en el trayecto situado ligeramente por encima del pliegue gl&#250;teo&#44; una tumoraci&#243;n fusiforme de 8<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>12<span class="elsevierStyleHsp" style=""></span>cm&#44; que englobaba el nervio&#46; Histol&#243;gicamente&#44; el tumor estaba constituido por c&#233;lulas neopl&#225;sicas de n&#250;cleos redondeados&#44; relativamente uniformes y escaso citoplasma&#46; Junto a numerosas im&#225;genes de mitosis&#44; estaban significativamente representadas estructuras rosetoides&#44; en las que las c&#233;lulas neopl&#225;sicas se dispon&#237;an en corona con centros fibrilares &#40;Rosetas de Homer-Wright&#41;&#46; Con M&#46; E&#46; se observaron c&#233;lulas pobremente diferenciadas&#44; de peque&#241;o tama&#241;o&#44; con escasas prolongaciones citoplasm&#225;ticas&#44; raros microt&#250;bulos y aislados gr&#225;nulos electrodensos&#46; Con t&#233;cnicas de inmunohistoqu&#237;mia&#44; se detect&#243; inmunoreactividad d&#233;bil para NSE y moderada y zonal para sinaptofisina&#46; En conclusi&#243;n&#44; pensamos que se trata de una neoplasia maligna de nervio perif&#233;rico&#44; rara&#44; originada a partir de c&#233;lulas neuroepiteliales primitivas&#44; con caracter&#237;sticas microsc&#243;picas&#44; ultraestructurales e inmunohistoqu&#237;micas similares a las de los Tumores Neuroectod&#233;rmicos Primitivos del Sistema Nervioso Central&#46;</p>"
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        "resumen" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A case of primitive neuroectodermal tumor arising in the sciatic nerve of a 30-year-old man is presented&#46; The patient was admitted to hospital with a sudden right-side sciatica and a tumoral mass in the right buttock&#46; At surgery a fusiform tumor of 8<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>12<span class="elsevierStyleHsp" style=""></span>cm was found in the proximal portion of the sciatic nerve&#46; An en block scission of tumoral mass with the segment of sciatic nerve affected was done&#46; The histological examination revealed a tumor composed of small cells with scanty cytoplasm and darkly-stained nuclei with fairly frequent mitoses&#46; In many areas the tumor cells were arranged in a well-marked rosette pattern with pale eosinophilic cores &#40;Homer-Wright rosettes&#41;&#46; Electron microscopy showed poorly differentiated cells with few cytoplasmic processes&#44; rare microtubules and isolated dense-core granules&#46; On immunohistochemical study&#44; a weak reaction with anti-NSE and a zonal positivity for synaptophisin were found&#46; We conclude that this tumor is a malignant peripheral neuroectodermal tumor derived from primitive neuroepithelio&#44; with microscopical&#44; ultrastructural imd immunohistochemical characteristics similar to Primitive Neuroectodermal Tumors of the Central Nervous System&#46;</p>"
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Tumor neuroectodérmico primitivo del nervio ciático
M. Moreno, J. Rodríguez, S. Coca, J. Martos, A. Barcena
Servicios de Anatomía Patológica y Neurocirugía del Hospital Universitario del Aire. Madrid
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            "apellidos" => "Barcena"
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            "entidad" => "Servicios de Anatom&#237;a Patol&#243;gica y Neurocirug&#237;a del Hospital Universitario del Aire&#46; Madrid"
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            0 => "Neuroepitelioma perif&#233;rico"
            1 => "Tumor neuroectod&#233;rmico primitivo"
            2 => "Nervio ci&#225;tico"
          ]
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          "clase" => "keyword"
          "titulo" => "Key words"
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          "palabras" => array:3 [
            0 => "Peripheral neuroepithelioma"
            1 => "Primitive neuroectodermal Tumor"
            2 => "Sciatic nerve"
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    "resumen" => array:2 [
      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Presentamos un caso de tumor neuroectod&#233;rmico primitivo originado en el nervio ci&#225;tico&#44; en un paciente con un cuadro cl&#237;nico de ciatalgia intensa desencadenada siempre al sentarse y un abultamiento notable en la regi&#243;n gl&#250;tea derecha&#46; En la intervenci&#243;n quir&#250;rgica&#44; se identific&#243; en el tronco del nervio ci&#225;tico&#44; en el trayecto situado ligeramente por encima del pliegue gl&#250;teo&#44; una tumoraci&#243;n fusiforme de 8<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>12<span class="elsevierStyleHsp" style=""></span>cm&#44; que englobaba el nervio&#46; Histol&#243;gicamente&#44; el tumor estaba constituido por c&#233;lulas neopl&#225;sicas de n&#250;cleos redondeados&#44; relativamente uniformes y escaso citoplasma&#46; Junto a numerosas im&#225;genes de mitosis&#44; estaban significativamente representadas estructuras rosetoides&#44; en las que las c&#233;lulas neopl&#225;sicas se dispon&#237;an en corona con centros fibrilares &#40;Rosetas de Homer-Wright&#41;&#46; Con M&#46; E&#46; se observaron c&#233;lulas pobremente diferenciadas&#44; de peque&#241;o tama&#241;o&#44; con escasas prolongaciones citoplasm&#225;ticas&#44; raros microt&#250;bulos y aislados gr&#225;nulos electrodensos&#46; Con t&#233;cnicas de inmunohistoqu&#237;mia&#44; se detect&#243; inmunoreactividad d&#233;bil para NSE y moderada y zonal para sinaptofisina&#46; En conclusi&#243;n&#44; pensamos que se trata de una neoplasia maligna de nervio perif&#233;rico&#44; rara&#44; originada a partir de c&#233;lulas neuroepiteliales primitivas&#44; con caracter&#237;sticas microsc&#243;picas&#44; ultraestructurales e inmunohistoqu&#237;micas similares a las de los Tumores Neuroectod&#233;rmicos Primitivos del Sistema Nervioso Central&#46;</p>"
      ]
      "en" => array:2 [
        "titulo" => "Summary"
        "resumen" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A case of primitive neuroectodermal tumor arising in the sciatic nerve of a 30-year-old man is presented&#46; The patient was admitted to hospital with a sudden right-side sciatica and a tumoral mass in the right buttock&#46; At surgery a fusiform tumor of 8<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>12<span class="elsevierStyleHsp" style=""></span>cm was found in the proximal portion of the sciatic nerve&#46; An en block scission of tumoral mass with the segment of sciatic nerve affected was done&#46; The histological examination revealed a tumor composed of small cells with scanty cytoplasm and darkly-stained nuclei with fairly frequent mitoses&#46; In many areas the tumor cells were arranged in a well-marked rosette pattern with pale eosinophilic cores &#40;Homer-Wright rosettes&#41;&#46; Electron microscopy showed poorly differentiated cells with few cytoplasmic processes&#44; rare microtubules and isolated dense-core granules&#46; On immunohistochemical study&#44; a weak reaction with anti-NSE and a zonal positivity for synaptophisin were found&#46; We conclude that this tumor is a malignant peripheral neuroectodermal tumor derived from primitive neuroepithelio&#44; with microscopical&#44; ultrastructural imd immunohistochemical characteristics similar to Primitive Neuroectodermal Tumors of the Central Nervous System&#46;</p>"
      ]
    ]
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      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara">Moreno&#44; M&#46;&#59; Rodr&#237;guez&#44; J&#46;&#59; Coca&#44; S&#46;&#59; Martos&#44; J&#46;&#59; B&#225;rcena&#44; A&#46;&#58; Tumor neuroectod&#233;nnico del nervio ci&#225;tico&#46; Neurocirug&#237;a 1993&#59; 4&#58; 316&#8211;320&#46;</p>"
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                            2 => "D&#46;M&#46; Parham"
                            3 => "L&#46;C&#46; Bowman"
                            4 => "A&#46; Green"
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                          "etal" => false
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                            0 => "W&#46;R&#46; Markesbery"
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ISSN: 11301473
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