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Original – Cáncer de próstata
Valor de la PET en la recurrencia del cáncer de próstata con PSA < 5 ng/ml
Usefulness of PET scans in diagnosing recurrent prostate cancer. Prostate with PSA level < 5ng/ml
Jorge Rioja Zuazua,
Autor para correspondencia
jriojazu@gmail.com

Autor para correspondencia.
, Macarena Rodríguezb, Aníbal Rincón Mayansa, Abel Saiz Sansia, Juan Javier Zudaire Bergeraa, Rafael Martínez-Mongec, José Ángel Richterb, José María Berián Poloa
a Departamento de Urología, Clínica Universitaria, Universidad de Navarra, Pamplona, Navarra, España
b Departamento de Medicina Nuclear, Clínica Universitaria, Universidad de Navarra, Pamplona, Navarra, España
c Departamento de Oncología Radioterápica, Clínica Universitaria, Universidad de Navarra, Pamplona, Navarra, España
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        "resumen" => "<span class="elsevierStyleSectionTitle">Introducci&#243;n y objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Evaluamos la utilidad de la tomograf&#237;a por emisi&#243;n de positrones &#40;PET&#41; en el diagn&#243;stico de la recurrencia del c&#225;ncer de pr&#243;stata tras tratamiento con intenci&#243;n curativa&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se someti&#243; a 92 pacientes consecutivos en progresi&#243;n bioqu&#237;mica tras cirug&#237;a radical &#40;63&#41; o radioterapia &#40;29&#41; a una PET&#46; En todos los casos&#44; se realizaron dos esc&#225;neres PET en el mismo d&#237;a &#40;<span class="elsevierStyleSup">11</span>C-colina y <span class="elsevierStyleSup">18</span>F-FDG&#41;&#46; Se eval&#250;a la eficacia de la PET de manera global &#40;utilizando los resultados con <span class="elsevierStyleSup">11</span>C-colina y <span class="elsevierStyleSup">18</span>F-FDG&#41; y de manera independiente para detectar recurrencia en pacientes con progresi&#243;n bioqu&#237;mica&#46; Para ello&#44; se utilizan la comparaci&#243;n de medias para k muestras independientes&#44; tablas de contingencia 2<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>2 y 2<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>X y curvas ROC&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">1</span>&#46; PET global&#58; hay evidencia de la alteraci&#243;n de la PET en funci&#243;n del ant&#237;geno prost&#225;tico espec&#237;fico &#40;PSA&#41; &#40;p &#61; 0&#44;003&#41;&#44; estadio cl&#237;nico &#40;p &#61; 0&#44;01&#41;&#46; No existe una alteraci&#243;n de la PET estad&#237;sticamente significativa en funci&#243;n de la afectaci&#243;n de la biopsia &#40;unilateral o bilateral&#41;&#44; los m&#225;rgenes quir&#250;rgicos&#44; el estadio patol&#243;gico y el tiempo a progresi&#243;n&#46; La curva ROC PET-PSA es significativa &#40;p &#60; 0&#44;0001&#41; y permite calcular distintos puntos de corte&#59; PSA &#61; 4&#44;3<span class="elsevierStyleHsp" style=""></span>ng&#47;ml el que presenta una mayor especificidad &#40;91&#37;&#41;&#46; <span class="elsevierStyleItalic">2</span>&#46; PET <span class="elsevierStyleSup">18</span>FDG&#58; el &#225;rea bajo la curva ROC es significativa &#40;p &#60; 0&#44;0001&#41;&#44; con una especificidad del 91&#37; para un PSA &#61; 6&#44;51 ng&#47;ml&#46; <span class="elsevierStyleItalic">3</span>&#46; PET <span class="elsevierStyleSup">11</span>colina&#58; el &#225;rea bajo la curva ROC es significativa &#40;p &#60; 0&#44;0001&#41;&#44; con una especificidad del 91&#37; para un PSA &#61; 5&#44;15<span class="elsevierStyleHsp" style=""></span>ng&#47;ml&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">La PET es una herramienta &#250;til en el diagn&#243;stico de la recurrencia de c&#225;ncer de pr&#243;stata tras tratamiento radical con intenci&#243;n curativa&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Introduction and objectives</span><p class="elsevierStyleSimplePara elsevierViewall">We intend to evaluate the usefulness of PET scans in diagnosing recurrent prostate cancer after a curative attempt using radical treatment&#46;</p> <span class="elsevierStyleSectionTitle">Material and methods</span><p class="elsevierStyleSimplePara elsevierViewall">92 consecutive prostate cancer patients in biochemical progression following radical surgery &#40;63&#41; or radiation treatment &#40;29&#41; were studied with positron emission tomography &#40;PET&#41;&#46; In all cases two scans were performed in the same day &#40;<span class="elsevierStyleSup">11</span>C-choline and <span class="elsevierStyleSup">18</span>F-FDG&#41;&#46; PET efficacy was evaluated both globally &#40;by employing the results achieved with both <span class="elsevierStyleSup">11</span>C-choline and <span class="elsevierStyleSup">18</span>F-FDG&#41; and using both radiotracers independently to detect recurrence in patients with biochemical progression&#46; For this purpose&#44; we used comparison of means for k-independent samples&#44; 2<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>2 and 2<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>X contingency tables and ROC curves&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">1</span>&#46; Global PET&#58; there is evidence of PET alteration regarding the PSA level &#40;<span class="elsevierStyleItalic">P</span>&#61;&#46;003&#41;&#58; the clinical stage &#40;<span class="elsevierStyleItalic">P</span>&#61;&#46;01&#41;&#46; There are no statistically significant PET alterations regarding the affected biopsy &#40;uni or bilateral&#41;&#44; surgical margins&#44; pathological stage and time to progression&#46; ROC curve PET-PSA is statistically significant &#40;<span class="elsevierStyleItalic">P</span>&#60;&#46;0001&#41; permitting calculation of different cut-off points&#44; with a specificity of 91&#37; &#40;highest&#41; for a PSA of 4&#46;3<span class="elsevierStyleHsp" style=""></span>ng&#47;ml&#46; <span class="elsevierStyleItalic">2</span>&#46; PET <span class="elsevierStyleSup">18</span>FDG&#58; the area under the ROC curve is statistically significant &#40;<span class="elsevierStyleItalic">P</span>&#60;&#46;0001&#41; with a specificity of 91&#37; for a PSA of 6&#46;51<span class="elsevierStyleHsp" style=""></span>ng&#47;ml&#46; <span class="elsevierStyleItalic">3</span>&#46; PET <span class="elsevierStyleSup">11</span>choline&#58; the area under the ROC curve is statistically significant &#40;<span class="elsevierStyleItalic">P</span>&#60;&#46;0001&#41; with a specificity of 91&#37; for a PSA of 5&#46;15<span class="elsevierStyleHsp" style=""></span>ng&#47;ml&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">PET is a useful tool for diagnosing prostate cancer recurrence after a curative attempt using radical treatment&#46;</p>"
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