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        "resumen" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Se analiza la presentaci&#243;n cl&#237;nico-radiol&#243;gica de cinco papilomas de plexo coroideo de la fosa posterior en el adulto&#46; Cuatro de estos tumores se localizaban en el cuarto ventr&#237;culo y uno ocupaba la regi&#243;n del &#225;ngulo pontocerebeloso &#40;APC&#41;&#46; El diagn&#243;stico diferencial de estos tumores se basa actualmente en la tomograf&#237;a axial computarizada &#40;TAC&#41;&#46; Aparte de la calcificaci&#243;n intratumoral que se observa en el 25&#37; de los casos aproximadamente&#44; pero que no les distingue de otros tumores de la misma localizaci&#243;n&#44; es caracter&#237;stico de los papilomas que presenten densidad elevada en el estudio sin contraste si bien un 20&#37; son isodensos en relaci&#243;n con el par&#233;nquima vecino&#46; Tras la inyecci&#243;n de contraste estos tumors captan &#225;vida y homog&#233;neamente&#44; a excepci&#243;n de aquellos que est&#225;n masivamente calcificados&#46; La irregularidad de los bordes tumorales en el estudio con contraste es bastante t&#237;pica y ayuda a diferenciarlos del ependimoma&#44; meduloblastoma y astrocitoma&#46; No existe un patr&#243;n angiogr&#225;fico caracter&#237;stico del papiloma de plexo&#44; si bien la angiograf&#237;a cerebral ayuda en el diagn&#243;stico diferencial con el hemangioblastoma&#46; La diferenciaci&#243;n radiol&#243;gica del papiloma del APC con otros tumores m&#225;s comunes de la regi&#243;n es m&#225;s f&#225;cil&#46;</p><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Se comenta la presentaci&#243;n macrosc&#243;pica del papiloma durante el acto quir&#250;rgico&#44; sus relaciones con las estructuras vecinas y el pron&#243;stico operatorio a corto y largo plazo&#46; Finalmente se considera el diagn&#243;stico diferencial histol&#243;gico con otras lesiones de estructura papilar&#46;</p>"
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        "resumen" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The authors analyze the clinicoradiological presentation of choroid plexus papilloma of the posterior fossa in five adult patients&#46; The tumor located into the fourth ventricle in four cases and in the cerebellopontine angle &#40;CPA&#41; in one&#46; Differential diagnosis of choroid plexus papilloma is currently based on computerized tomography &#40;CT&#41;&#46; Apart from intratumoral calcifications&#44; which occur in nearly 25&#37; of the cases&#44; papillomas usualy show an increased density in the CT study&#46; Following contrast injection tumor enhancement is marked and homogeneous&#46; Irregularity of the tumoral borders is a most characteristic finding which helps in the differential diagnosis with other tumors of the regi&#243;n&#46; Differential diagnosis&#44;of CPA papilloma is easy&#46; There is not a characteristic angiographic pattern of choroid plexus papilloma but cerebral angiography may aid to distinguish this tumor from solid hemangioblastoma&#46;</p><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The surgical findings&#44; technical problems and the immediate and long term prognosis with posterior fossa papillomas are considered&#46;</p>"
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Vol. 1. Núm. 2.
Páginas 71-78 (enero 1990)
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Vol. 1. Núm. 2.
Páginas 71-78 (enero 1990)
Papilomas de plexo coroideo de la fosa posterior
Visitas
3271
R.D. Lobato, J.J. Rivas, P. Gómez, S. Madero, A. Cabrera, M.aJ. Muñoz, J.M. Cañizal, E. Lamas
Servicio de Neurocirugía y Sección de Neuropatología, Hospital «12 de Octubre», Madrid
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Resumen

Se analiza la presentación clínico-radiológica de cinco papilomas de plexo coroideo de la fosa posterior en el adulto. Cuatro de estos tumores se localizaban en el cuarto ventrículo y uno ocupaba la región del ángulo pontocerebeloso (APC). El diagnóstico diferencial de estos tumores se basa actualmente en la tomografía axial computarizada (TAC). Aparte de la calcificación intratumoral que se observa en el 25% de los casos aproximadamente, pero que no les distingue de otros tumores de la misma localización, es característico de los papilomas que presenten densidad elevada en el estudio sin contraste si bien un 20% son isodensos en relación con el parénquima vecino. Tras la inyección de contraste estos tumors captan ávida y homogéneamente, a excepción de aquellos que están masivamente calcificados. La irregularidad de los bordes tumorales en el estudio con contraste es bastante típica y ayuda a diferenciarlos del ependimoma, meduloblastoma y astrocitoma. No existe un patrón angiográfico característico del papiloma de plexo, si bien la angiografía cerebral ayuda en el diagnóstico diferencial con el hemangioblastoma. La diferenciación radiológica del papiloma del APC con otros tumores más comunes de la región es más fácil.

Se comenta la presentación macroscópica del papiloma durante el acto quirúrgico, sus relaciones con las estructuras vecinas y el pronóstico operatorio a corto y largo plazo. Finalmente se considera el diagnóstico diferencial histológico con otras lesiones de estructura papilar.

Palabras clave:
Tumor
papiloma
plexo coroideo
cuarto ventrículo
ángulo pontocerebeloso
hidrocefalia
Abstract

The authors analyze the clinicoradiological presentation of choroid plexus papilloma of the posterior fossa in five adult patients. The tumor located into the fourth ventricle in four cases and in the cerebellopontine angle (CPA) in one. Differential diagnosis of choroid plexus papilloma is currently based on computerized tomography (CT). Apart from intratumoral calcifications, which occur in nearly 25% of the cases, papillomas usualy show an increased density in the CT study. Following contrast injection tumor enhancement is marked and homogeneous. Irregularity of the tumoral borders is a most characteristic finding which helps in the differential diagnosis with other tumors of the región. Differential diagnosis,of CPA papilloma is easy. There is not a characteristic angiographic pattern of choroid plexus papilloma but cerebral angiography may aid to distinguish this tumor from solid hemangioblastoma.

The surgical findings, technical problems and the immediate and long term prognosis with posterior fossa papillomas are considered.

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