<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1025-0255</journal-id>
<journal-title><![CDATA[Revista Archivo Médico de Camagüey]]></journal-title>
<abbrev-journal-title><![CDATA[AMC]]></abbrev-journal-title>
<issn>1025-0255</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Médicas de Camagüey]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1025-02552018000300008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización de los pacientes con cáncer de colon]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization of patients with colon cancer]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guibert Adolfo]]></surname>
<given-names><![CDATA[Luis Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiroga Meriño]]></surname>
<given-names><![CDATA[Luis Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada Brizuela]]></surname>
<given-names><![CDATA[Yarima]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maestre Ramos]]></surname>
<given-names><![CDATA[Osmany Mario]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guilarte León]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Ciencias Médicas de Camagüey Hospital Militar Universitario Dr. Octavio de la Concepción de la Pedraja ]]></institution>
<addr-line><![CDATA[Camagüey ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>324</fpage>
<lpage>335</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1025-02552018000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1025-02552018000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1025-02552018000300008&amp;lng=en&amp;nrm=iso"></self-uri><kwd-group>
<kwd lng="es"><![CDATA[NEOPLASIAS DEL COLON/cirugía]]></kwd>
<kwd lng="es"><![CDATA[ADENOCARCINOMA]]></kwd>
<kwd lng="es"><![CDATA[ESFINTEROTOMÍA ENDOSCÓPICA]]></kwd>
<kwd lng="es"><![CDATA[ANCIANO]]></kwd>
<kwd lng="es"><![CDATA[ESTUDIOS TRANSVERSALES]]></kwd>
<kwd lng="en"><![CDATA[COLONIC NEOPLASMS/surgery]]></kwd>
<kwd lng="en"><![CDATA[ADENOCARCINOMA]]></kwd>
<kwd lng="en"><![CDATA[SPHINCTEROTOMY, ENDOSCOPIC]]></kwd>
<kwd lng="en"><![CDATA[AGED]]></kwd>
<kwd lng="en"><![CDATA[CROSS-SECTIONAL STUDIES]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ART&Iacute;CULO ORIGINAL</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>Caracterizaci&oacute;n de los pacientes con c&aacute;ncer de colon</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b><i>Characterization of patients with colon cancer</i></b></font></p>     <p align="justify">&nbsp;</p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Dr. Luis Andr&eacute;s Guibert Adolfo; Dr. Luis Ernesto  Quiroga Meri&ntilde;o; Dra. Yarima Estrada Brizuela; Dr. Osmany Mario Maestre Ramos; Dr.  Germ&aacute;n Guilarte Le&oacute;n.</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Hospital Militar  Universitario Dr. Octavio de la Concepci&oacute;n de la Pedraja. Universidad  de Ciencias M&eacute;dicas de Camag&uuml;ey. Camag&uuml;ey, Cuba. </font></p>     <p align="justify">&nbsp;</p> <hr align="JUSTIFY">     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMEN</b></font>    <br>   <font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fundamento</b>:  el c&aacute;ncer de colon es la tercera causa m&aacute;s frecuente de morbilidad y mortalidad  por c&aacute;ncer en el mundo.     <br>   <b>Objetivos</b>: caracterizar los pacientes con c&aacute;ncer de colon.     <br>   <b>M&eacute;todos: </b>se  realiz&oacute; un estudio de tipo descriptivo transversal con el objetivo  de caracterizar los pacientes con c&aacute;ncer de colon en el Servicio de Cirug&iacute;a  General del Hospital Militar, desde octubre de 2013 hasta agosto de 2017. El universo  estuvo compuesto por 61 pacientes con diagn&oacute;stico de c&aacute;ncer de colon.     <br>   <b>Resultados</b>: en el estudio predominaron las mujeres, los  pacientes mayores de 60 a&ntilde;os resultaron la mayor&iacute;a, en espec&iacute;fico los del grupo  de 70-79 a&ntilde;os. El adenoma velloso result&oacute; el antecedente m&aacute;s frecuente. El  sangrado digestivo bajo result&oacute; la forma de presentaci&oacute;n predominante en aquellos  con localizaci&oacute;n izquierda del tumor. En la mayor parte el c&aacute;ncer estaba bien  diferenciado. El adenocarcinoma resulto el tipo histol&oacute;gico m&aacute;s frecuente.     <br> <b>Conclusiones:</b> predominaron  las mujeres entre 70 y 79 a&ntilde;os, como antecedentes patol&oacute;gicos personales los  adenomas vellosos. El sangrado digestivo bajo result&oacute; la forma cl&iacute;nica m&aacute;s  frecuente, y se asoci&oacute; a localizaci&oacute;n izquierda. Una parte de los pacientes  requiri&oacute; intervenci&oacute;n quir&uacute;rgica y la t&eacute;cnica m&aacute;s empleada fue la  hemicolectom&iacute;a izquierda. La mayor parte de las neoplasias estaban bien  diferenciadas, con inflamaci&oacute;n cr&oacute;nica.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>DeCS:</b> NEOPLASIAS DEL COLON/cirug&iacute;a;  ADENOCARCINOMA; ESFINTEROTOM&Iacute;A ENDOSC&Oacute;PICA; ANCIANO; ESTUDIOS TRANSVERSALES. </font></p> <hr align="JUSTIFY">     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT </b>    <br>   <b>Background:</b> colon cancer is the third more frequent cause of  morbidity and mortality for cancer in the world.     <br>   <b>Objective:</b> to characterize the  patients with colon cancer.    ]]></body>
<body><![CDATA[<br>   <b>Methods:</b> a transversal and descriptive study was carried  out aimed at characterizing patients with colon cancer in the Service of General Surgery of the Military Hospital Octavio  de la Concepci&oacute;n y la Pedraja from October 2013 to August 2017. The universe  was compound for 61 patients diagnosed with colon cancer.    <br>   <b>Results:</b> women prevailed in the study. Patients older  than 60 years were the majority, specifically those from the 70 to 79 age  group. The hairy adenoma is the more frequent antecedent followed by the  ulcerative colitis. The low digestive bleeding was the form of predominant  presentation in the patients and the left localization of the tumor was the  most frequent. In most of the patients the colon cancer was well differentiated. The adenocarcinoma is the more frequent  histological type.     <br> <b>Conclusions:</b> women prevailed between 70  and 79 years with adenomas as pathological antecedents. Digestive bleeding was  the clinical form of more frequent presentation, and it was associated to left  localization. A part of the studied patients required surgical intervention and  the most used technique was the left hemicolectomy. Most of the neoplasias were  well differentiated with chronic inflammation.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>DeCS:</b> COLONIC NEOPLASMS/surgery; ADENOCARCINOMA; SPHINCTEROTOMY, ENDOSCOPIC; AGED; CROSS-SECTIONAL STUDIES. </font></p> <hr align="JUSTIFY">     <p align="justify">&nbsp;</p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>INTRODUCCI&Oacute;N</b> </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El  c&aacute;ncer colorrectal, como problema de salud p&uacute;blica, es creciente en el mundo, el  aumento en la expectativa de vida de las poblaciones, la mayor exposici&oacute;n a  carcin&oacute;genos reconocidos, la ampliaci&oacute;n de la cobertura de los programas de  salud, el continuo mejoramiento de las t&eacute;cnicas de tamizaje y la b&uacute;squeda  activa de casos, son las razones por las cuales cada a&ntilde;o se informa un aumento  en el n&uacute;mero global de casos diagnosticados con c&aacute;ncer. Seg&uacute;n datos del  Instituto Nacional de Salud de Estados Unidos, en este pa&iacute;s ocurren m&aacute;s de 500 000  muertes cada a&ntilde;o a consecuencia de esta enfermedad. Incidencia de la cual no escapa  Cuba donde se estima que el 35 % de la poblaci&oacute;n sufrir&aacute; de un tumor maligno  para alrededor del 2030. <sup>1-3</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El c&aacute;ncer de colon es la tercera causa m&aacute;s frecuente de morbilidad y mortalidad por  c&aacute;ncer en el mundo tanto para hombres como mujeres. Las tasas de incidencia y  mortalidad estandarizadas por edad por 100 000 personas-a&ntilde;o para 2008 fueron  17,2 y 8,2. El c&aacute;ncer de colon es un importante problema de  salud p&uacute;blica en todo el mundo, en especial en los pa&iacute;ses ricos. <sup>4,5</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Aunque la incidencia y la mortalidad por c&aacute;ncer de  colon han declinado en los &uacute;ltimos a&ntilde;os en Am&eacute;rica, es la tercera causa m&aacute;s  com&uacute;n de mortalidad por c&aacute;ncer. M&aacute;s de 155 000 personas mueren cada a&ntilde;o por  esta causa y se diagnostican 140 000 nuevos casos al a&ntilde;o. <sup>6-9</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En Cuba en el a&ntilde;o 2016 fallecieron  2 331 pacientes por esta causa. Lo cual constituy&oacute;  la cuarta causa de muerte por tumores malignos, lo que representa 20,7  pacientes cada 100 000 habitantes. <sup>2-7</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El tratamiento m&aacute;s efectivo  para este tipo de neoplasia es el quir&uacute;rgico y su objetivo es extirpar todo el  tejido maligno y un margen adecuado de tejido sano, al mismo tiempo con su  territorio de drenaje linf&aacute;tico, disminuye al m&iacute;nimo la morbilidad y mortalidad  relacionada con este procedimiento. La t&eacute;cnica quir&uacute;rgica en cada caso depende  de su estadio, de su localizaci&oacute;n y de la presencia de otras lesiones  colorrectales y de la extensi&oacute;n a otros &oacute;rganos. <sup>10</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El  pron&oacute;stico de estos tumores est&aacute; relacionado de manera directa con la  precocidad del diagn&oacute;stico y est&aacute; demostrado que guarda una estrecha relaci&oacute;n  con su grado de penetraci&oacute;n en las paredes del &oacute;rgano, con la afectaci&oacute;n de los  ganglios linf&aacute;ticos regionales, con la invasi&oacute;n de los &oacute;rganos vecinos y con la  existencia de met&aacute;stasis a distancia, por ello es tan &uacute;til su estadificaci&oacute;n  para establecer un pron&oacute;stico. La aparici&oacute;n de complicaciones, que por lo  general est&aacute; relacionada con la demora en el diagn&oacute;stico, es un hecho que  influye de manera negativa en el pron&oacute;stico, pues aumenta de manera notable la  mortalidad. <sup>11,12</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por lo que se decidi&oacute; realizar el estudio y  caracterizar a los pacientes con c&aacute;ncer de colon en el servicio de Cirug&iacute;a  General con  el prop&oacute;sito de ampliar los conocimientos del mismo y las formas m&aacute;s eficaces  de tratarlo.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>M&Eacute;TODOS</b> </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La  investigaci&oacute;n constituy&oacute; un estudio de desarrollo de tipo descriptivo transversal con el objetivo de caracterizar los  pacientes con c&aacute;ncer de colon en el Servicio de Cirug&iacute;a General del Hospital  Militar Octavio de la Concepci&oacute;n de la Pedraja desde octubre de 2013 hasta agosto  de 2017. El universo estuvo compuesto por 61 pacientes con diagn&oacute;stico de  c&aacute;ncer de colon, atendidos en el Servicio de Cirug&iacute;a General durante el periodo  de tiempo antes se&ntilde;alado. Los criterios de inclusi&oacute;n fueron: ser diagnosticado con  c&aacute;ncer de colon y la confirmaci&oacute;n del tipo histol&oacute;gico por biopsia, mientras  los de exclusi&oacute;n fueron: la imposibilidad para recolectar la informaci&oacute;n y la  no confirmaci&oacute;n por biopsia. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Recolecci&oacute;n y an&aacute;lisis de la informaci&oacute;n</b>    <br>   Los  datos provenientes de la revisi&oacute;n de las historias cl&iacute;nicas  fueron recogidos en un formulario, que incluy&oacute; las variables tales como edad,  sexo, antecedentes patol&oacute;gicos personales, formas de presentaci&oacute;n cl&iacute;nica y  caracter&iacute;sticas patol&oacute;gicas de las neoplasias, este se confeccion&oacute; a prop&oacute;sito  de la investigaci&oacute;n y basado en la informaci&oacute;n te&oacute;rica revisada. Se  cre&oacute; una base de datos en SPSS que permiti&oacute; el procesamiento de los mismos  mediante t&eacute;cnicas de estad&iacute;stica descriptiva e inferencial.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se  emplearon herramientas de estad&iacute;stica descriptivas consistentes en distribuci&oacute;n  de frecuencias absolutas y relativas, contraste de proporciones y determinaci&oacute;n  de la significaci&oacute;n del contraste mediante X2 con nivel de  significaci&oacute;n de 95 %. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>RESULTADOS</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El aumento  progresivo de pacientes con c&aacute;ncer, constituyen un reto para la medicina actual;  el desarrollo de m&eacute;todos diagn&oacute;sticos y el acceso a la medicina han reducido el  tiempo para el diagn&oacute;stico en fases m&aacute;s tempranas de la enfermedad y con ello un  incremento en las cifras reportadas cada a&ntilde;o.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se distribuyeron  pacientes seg&uacute;n grupos de edades y sexo en la cual predominaron las mujeres  (59,01 %) sobre los hombres (40,98 %). En cuanto a los grupos de edades, los  pacientes mayores de 60 a&ntilde;os resultaron la mayor&iacute;a y en espec&iacute;fico los situados  en el grupo de 70-79 a&ntilde;os (39,34 %) (<a href="#tabla1">tabla 1</a>).</font></p>     <p align="center"><img src="/img/revistas/amc/v22n3/t01080318.jpg" alt="tabla 1" width="630" height="271" longdesc="../IMG no 3/5552/t01080318.jpg"><a name="tabla1"></a></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se  analiz&oacute; la distribuci&oacute;n de los pacientes seg&uacute;n antecedentes  patol&oacute;gicos personales, alrededor de un tercio de los pacientes  carec&iacute;a de antecedentes patol&oacute;gicos personales relacionados con el c&aacute;ncer de  colon (29,50 %). El adenoma velloso result&oacute; el antecedente m&aacute;s frecuente (34,42  %) seguido de la colitis ulcerativa (14,75 %). La diverticulosis de colon  (11,47 %) y poliposis (9,83 %) se reportaron en menor n&uacute;mero de pacientes  (<a href="#tabla2">tabla 2</a>). </font></p>     <p align="center"><img src="/img/revistas/amc/v22n3/t02080318.jpg" alt="tabla 2" width="454" height="252" longdesc="../IMG no 3/5552/t02080318.jpg"><a name="tabla2"></a></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La  distribuci&oacute;n de los pacientes seg&uacute;n presentaci&oacute;n  cl&iacute;nica en relaci&oacute;n a la localizaci&oacute;n de la neoplasia, el  sangrado digestivo bajo result&oacute; la forma de presentaci&oacute;n predominante en los  pacientes estudiados (37,60 %), seguido del s&iacute;ndrome an&eacute;mico (29,50 %), s&iacute;ndrome  oclusivo (24,59 %) y s&iacute;ndrome general (8,06 %). El c&aacute;ncer de colon predomin&oacute; en  la localizaci&oacute;n izquierda (60,65 %) (<a href="#tabla3">tabla 3</a>).</font></p>     <p align="center"><img src="/img/revistas/amc/v22n3/t03080318.jpg" alt="tabla 3" width="613" height="224" longdesc="../IMG no 3/5552/t03080318.jpg"><a name="tabla3"></a></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En  la se analiz&oacute; las caracter&iacute;sticas patol&oacute;gicas de las  neoplasias, en la mayor parte de los pacientes el c&aacute;ncer de colon  estaba bien diferenciado (47,64 %) y presentaba evidencias de inflamaci&oacute;n  cr&oacute;nica (70,49 %) (<a href="#tabla4">tabla 4</a>).</font></p>     <p align="center"><img src="/img/revistas/amc/v22n3/t04080318.jpg" alt="tabla 4" width="598" height="220" longdesc="../IMG no 3/5552/t04080318.jpg"><a name="tabla4"></a></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>DISCUSI&Oacute;N</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En  la investigaci&oacute;n se encontr&oacute; predominio del sexo femenino y pacientes mayores  de 60 a&ntilde;os, lo cual coincide con lo reportado por Ferreira  EJ y Mel&eacute;ndez HJ,<sup> 13</sup> en  su estudio donde evidenciaron que la media de edad de sus pacientes con c&aacute;ncer  de colon fue de 62 a&ntilde;os y existi&oacute; un predominio del sexo, resultados  estos que a pesar de incluir en su serie a pacientes intervenidos de urgencia  coinciden con lo reportado en el trabajo. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Montes de Oca Meg&iacute;as E et al. <sup>14</sup> reportan un promedio de edad de 61,5 a&ntilde;os, con  predominio del sexo femenino, se&ntilde;alan adem&aacute;s que el 85 % de los casos de c&aacute;ncer de colon  ocurre en individuos de m&aacute;s de 60 a&ntilde;os y que en Europa la incidencia del mismo aumenta con la edad, a esto contribuyen factores  ambientales y del estilo de vida, con una tendencia al aumento en el sexo  masculino a partir de los 50 a&ntilde;os. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Neuhouser ML et al. <sup>15</sup> en Estados Unidos reportan incidencia similar del c&aacute;ncer de colon  para ambos sexos, con un incremento despu&eacute;s de los 40 a&ntilde;os y que el 90 % de los casos ocurren en mayores de 50 a&ntilde;os; en la actualidad existe una tendencia a diagnosticarse en personas  m&aacute;s j&oacute;venes, se encuentra dentro de los 10 diagn&oacute;sticos m&aacute;s comunes en  individuos entre los 20 y 49 a&ntilde;os. <sup>16</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En la regi&oacute;n de  Latinoam&eacute;rica se han descrito resultados similares. En Colombia, reportan que  la edad media para  padecer de c&aacute;ncer de colon  es de 54 a&ntilde;os, con predominio  femenino. <sup>17-19</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Otros  autores como Ojima T et al. <sup>20 </sup>reportan en los 76 informes  estudiados sobre caracterizaci&oacute;n videoendosc&oacute;pica de c&aacute;ncer de colon, que el  paciente de menor edad ten&iacute;a 26 a&ntilde;os y el de mayor edad 86 a&ntilde;os, para un  promedio de edad de 62 a&ntilde;os, predominaron los pacientes en edades entre 50 y 64  a&ntilde;os.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La  presencia de adenomas vellosos se ha asociado a la aparici&oacute;n de c&aacute;ncer de colon  la mayor parte de ellos, sea cual sea su causa, derivan de p&oacute;lipos  adenomatosos. S&oacute;lo los adenomas son premalignos, y una minor&iacute;a de ellos se  transforma en c&aacute;ncer. Los estudios de detecci&oacute;n sistem&aacute;tica en la poblaci&oacute;n y  las necropsias han revelado que los p&oacute;lipos adenomatosos de colon se pueden  encontrar en m&aacute;s del 30 % de las personas de edad mediana o avanzada. A pesar  de esto, menos de 1 % de los p&oacute;lipos llegan a hacerse malignos y una gran parte  de los p&oacute;lipos no producen s&iacute;ntomas y permanecen sin ser detectados de forma  cl&iacute;nica. <sup>21-24</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los  antecedentes patol&oacute;gicos familiares y personales de c&aacute;ncer de colon,  constituyen factores de riesgo importantes para el desarrollo de este tumor  seg&uacute;n Malvezzi M et al.<sup> 25</sup> estos se&ntilde;alan adem&aacute;s que los pacientes  que presentan antecedentes de c&aacute;ncer de colon familiar, presentan un riesgo  incrementado de dos a seis veces de padecer la enfermedad, a lo que se le suma  el n&uacute;mero de familiares afectos, el grado de parentesco y la edad de  diagn&oacute;stico de la neoplasia; de la misma forma, el riesgo aumenta cuando  existen antecedentes familiares de p&oacute;lipos adenomatosos col&oacute;nicos, en especial  si han sido diagnosticados antes de los 60 a&ntilde;os de edad. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En  cuanto a la presentaci&oacute;n cl&iacute;nica, el sangramiento digestivo bajo predomin&oacute; en  la mayor&iacute;a de los pacientes de la investigaci&oacute;n, lo que pudiera estar en  relaci&oacute;n a la localizaci&oacute;n predominante del c&aacute;ncer en el sigmoides, autores como Adams SA et  al. <sup>26</sup>&nbsp;reportan resultados similares.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Otros  autores como Hano  Garc&iacute;a OM, et al, <sup>28</sup>&nbsp;reportan como principal hallazgo al examen f&iacute;sico la  presencia de masa abdominal y como hallazgo inespec&iacute;fico, el dolor a la  palpaci&oacute;n fue positivo en m&aacute;s de un tercio de  los pacientes. Lynch HT et al. <sup>29</sup> se&ntilde;alan que la prueba de sangre oculta en heces fecales empleada,  presenta una sensibilidad y especificidad alta para el c&aacute;ncer colorrectal, no  as&iacute; para los p&oacute;lipos del colon. <sup>30</sup> </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Kwakman R et al.<sup> 31</sup> se&ntilde;alan en su trabajo que las principales  indicaciones de colonoscopia entre los pacientes diagnosticados de c&aacute;ncer de  colon la indicaci&oacute;n m&aacute;s frecuente fue la hematoquezia, seguida de anemia, dolor  abdominal, rectorragia, sospecha de c&aacute;ncer de colon, diarrea cr&oacute;nica, sospecha  radiol&oacute;gica, s&iacute;ndrome consuntivo, estudio de met&aacute;stasis hep&aacute;tica, s&iacute;ndrome  rectal, tumor abdominal, seguimiento de p&oacute;lipos y pesquizaje.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Leake I, <sup>32</sup> se&ntilde;ala que el dolor  abdominal, el cambio del h&aacute;bito intestinal y la p&eacute;rdida de peso fueron los  s&iacute;ntomas m&aacute;s frecuentes. Laskar RS et al. <sup>33 </sup>se&ntilde;alan que las neoplasias distales (colon  descendente a recto) pueden presentarse con alteraciones como la disminuci&oacute;n del calibre y deposiciones con sangre como hematoquezia, datos que coinciden con lo obtenido en la investigaci&oacute;n  donde predomin&oacute; el sangrado digestivo bajo y los s&iacute;ntomas relacionados con la  oclusi&oacute;n intestinal.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En  el estudio predomin&oacute; el c&aacute;ncer en el colon izquierdo, datos que se asemejan a lo encontrado  por Karel MJ et al. <sup>34</sup>  y Zanella ER et al. <sup>35</sup> donde  m&aacute;s de la mitad de los pacientes tamizados presentaron el tumor desde el ciego  hasta la mitad del colon transverso. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El adenocarcinoma result&oacute; la  variedad histol&oacute;gica m&aacute;s frecuente en la serie de pacientes estudiado. <sup>36,37</sup> En opini&oacute;n de estos autores los adenocarcinomas  constituyen la variedad histol&oacute;gica m&aacute;s com&uacute;n del c&aacute;ncer de colon, representando  alrededor de 95 % de estos. A su vez por el grado de diferenciaci&oacute;n, los bien diferenciados  predominaron en el estudio, asociados a inflamaci&oacute;n cr&oacute;nica, datos que coinciden  con lo hallado por Wang L et al. <sup>38</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSIONES </b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En  la investigaci&oacute;n predominaron las mujeres entre 70 y 79 a&ntilde;os, de piel blanca y  con antecedentes patol&oacute;gicos personales de adenomas vellosos. El sangrado  digestivo bajo result&oacute; la forma cl&iacute;nica de presentaci&oacute;n m&aacute;s frecuente, y se  asoci&oacute; a localizaci&oacute;n izquierda. Una parte de los pacientes estudiados requiri&oacute;  intervenci&oacute;n quir&uacute;rgica y la t&eacute;cnica m&aacute;s empleada fue la hemicolectom&iacute;a  izquierda. La mayor parte de las neoplasias estaban bien diferenciadas, con  inflamaci&oacute;n cr&oacute;nica y atravesaban la muscular propia sin afectaci&oacute;n de los  ganglios (Estadio B2 de Astler y Coller). El adenocarcinoma result&oacute; la variante  histol&oacute;gica m&aacute;s frecuente. Las complicaciones resultaron pocas y las m&aacute;s  frecuentes fueron la hemorragia e infecci&oacute;n de la herida quir&uacute;rgica. </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="left"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>REFERENCIAS BIBLIOGR&Aacute;FICAS</b> </font></p>     ]]></body>
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Decreased expression of long  noncoding RNA MEG3 affects cell proliferation and predicts a poor prognosis in  patients with colorectal cancer. Tumour Biol [Internet]. 2015 Feb [cited 2015  Mar 20];36:[about 13 p.]. Available from: <a href="http://link.springer.com/article/10.1007/s13277-015-3139-2#page-2">http://link.springer.com/article/10.1007/s13277-015-3139-2#page-2</a> </font><p align="left"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">38.Wang  L, Shen X, Wang Z, Xiao X, Wei P, Wang Q, et al. A molecular signature for the  prediction of recurrence in colorectal cancer. Mol Cancer [Internet]. 2015 Feb  [cited 2015 Mar 20];14(22):[about 7 p.]. Available from: <u><a href="http://molecular-cancer.biomedcentral.com/articles/10.1186/s12943-015-0296-2" target="_blank">http://molecular-cancer.biomedcentral.com/articles/10.1186/s12943-015-0296-2 </a></u></font></p>     <p align="justify">&nbsp;</p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Recibido:  11 de diciembre de 2017    <br>   Aprobado:3  de marzo de 2018</font></p>     ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Dr. Luis Andr&eacute;s  Guibert Adolfo. Especialista de I Grado en Medicina General. Especialista de I  Grado en Cirug&iacute;a General. Profesor Instructor. Hospital Militar Cl&iacute;nico  Quir&uacute;rgico Docente Dr. Octavio de la Concepci&oacute;n de la Pedraja. Universidad  de Ciencias M&eacute;dicas de Camag&uuml;ey. Camag&uuml;ey,  Cuba.    Email:<a href="mailto:%20luis.cmw@infomed.sld.cu"> luis.cmw@infomed.sld.cu</a> </font></p>      ]]></body><back>
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