<?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>1561-3194</journal-id>
<journal-title><![CDATA[Revista de Ciencias Médicas de Pinar del Río]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Ciencias Médicas]]></abbrev-journal-title>
<issn>1561-3194</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1561-31942022000100023</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diagnóstico diferencial de la estenosis biliar, un desafío en la práctica clínica]]></article-title>
<article-title xml:lang="en"><![CDATA[Differential diagnosis of biliary stricture, a challenge in clinical practice]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barroso-Márquez]]></surname>
<given-names><![CDATA[Lisset]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chao-González]]></surname>
<given-names><![CDATA[Lissette]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Samada-Suárez]]></surname>
<given-names><![CDATA[Marcia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigaciones Medico Quirúrgicas  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1561-31942022000100023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1561-31942022000100023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1561-31942022000100023&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  la estenosis biliar es un estrechamiento de los conductos biliares intrahepáticos o extrahepáticos de etiología variada; se plantea que entre 76-85 % son malignas y el resto corresponden a causas benignas.  Objetivo:  describir el diagnóstico diferencial de la estenosis biliar.  Métodos:  se consultaron las bases de datos (Pubmed, Cochrane Library, EBSCO, Clinical Key, Springer, MedScape y SciELO en busca de artículos publicados hasta la actualidad relacionados con la temática.  Desarrollo:  la ausencia de características clínicas específicas de la estenosis biliar junto a las limitaciones de las pruebas de imágenes e histológicas, hacen del diagnóstico diferencial un desafío en la práctica médica habitual. Para su diferenciación se utilizan métodos diagnósticos no invasivos como la ecografía abdominal, la tomografía axial computarizada y la colangioresonancia magnética. La colangiopancreatografía retrógrada endoscópica y la ecoendoscopia con punción por aspiración con aguja fina; son los métodos invasivos más usados. Otras técnicas más actuales son la coangioscopiaperoral y el ultrasonido intraductal, la primera con mayor costo y riesgo de complicaciones. La dosificación de marcadores tumorales y biomoleculares es un elemento a tener en cuenta para el diagnóstico.  Conclusiones:  determinar la diferenciación entre estenosis benigna o maligna es complejo, se requiere de la integración de medios diagnósticos que no siempre son accesibles en todos los centros hospitalarios. La colangiopancreatografía retrograda endoscópica con citología es un estudio invasivo, pero de amplia disponibilidad, en manos expertas presenta bajas tasas de complicaciones y elevada eficacia para el diagnóstico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  biliary stricture is a narrowing of intrahepatic or extrahepatic bile ducts of varied etiology; it is suggested that 76-85 % are malignant and the rest correspond to benign causes.  Objective:  to describe the differential diagnosis of biliary stricture.  Methods:  databases (Pubmed, Cochrane Library, EBSCO, Clinical Key, Springer, MedScape and SciELO) were reviewed in search of articles published to the present date related to the theme.  Development:  the absence of specific clinical characteristics of biliary stricture, together with the limitations of imaging and histological tests to make differential diagnosis, constitute a challenge in routine medical practice. Non-invasive diagnostic methods such as abdominal ultrasound, computed tomography and magnetic resonance cholangiography are used for its differentiation. Endoscopic retrograde pancreatic cholangiography and fine needle aspiration cholangioendoscopy are the most commonly used invasive methods. Other more current techniques are per-oral cholangioscopy and intraductal ultrasound, the former with higher cost and risk of complications. The dosage of tumor and biomolecular markers is an element to be taken into account for diagnosis.  Conclusions:  determining the differentiation between benign or malignant stenosis is complex and requires the integration of diagnostic means that are not always accessible in all hospital centers. Endoscopic retrograde pancreatic cholangiography with cytology is an invasive study but widely available, with low complication rates and high diagnostic efficacy in expert hands.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ESTENOSIS]]></kwd>
<kwd lng="es"><![CDATA[DIAGNÓSTICO]]></kwd>
<kwd lng="es"><![CDATA[TRATAMIENTO]]></kwd>
<kwd lng="en"><![CDATA[STENOSIS]]></kwd>
<kwd lng="en"><![CDATA[DIAGNOSIS]]></kwd>
<kwd lng="en"><![CDATA[TREATMENT]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dorrell]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Pawa]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Zhou]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Diagnostic Dilemma of Malignant Biliary Strictures]]></article-title>
<source><![CDATA[Diagnostics]]></source>
<year>2020</year>
<volume>10</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>337</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moya]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Moyano]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Claves para el diagnóstico diferencial de las estenosis biliares: ¿Cómo nos pueden ayudar las técnicas de imagen?]]></article-title>
<source><![CDATA[RAPD ONLINE]]></source>
<year>2017</year>
<volume>40</volume>
<numero>6</numero>
<issue>6</issue>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ma]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Jayasekeran]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Chong]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Benign biliary strictures: prevalence, impact, and management strategies.]]></article-title>
<source><![CDATA[Clin Exp Gastroenterol]]></source>
<year>2019</year>
<volume>2019</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>83-92.</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Saxena]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Kaffes]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bening biliary strictures: A systematic Review on Endoscopic Treatment options]]></article-title>
<source><![CDATA[Diagnostics]]></source>
<year>2020</year>
<volume>10</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>221</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prakash]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Priya]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Rao]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Koshy]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pillai]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Venu]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Su1563 Changing Clinical Spectrum of Bening Biliary Strictures.]]></article-title>
<source><![CDATA[GIE]]></source>
<year>2020</year>
<volume>91</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>AB381</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bowlus]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Olson]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Gershwin]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of indeterminate biliary strictures. Nat]]></article-title>
<source><![CDATA[Rev Gastroenterol Hepatol]]></source>
<year>2016</year>
<volume>13</volume>
<page-range>28-37</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saurí]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<source><![CDATA[Caracterización molecular de los tumores de vías biliares avanzados e identificación de biomarcadores potenciales predictivos de respuesta a nuevas dianas terapeúticas]]></source>
<year>2019</year>
<publisher-name><![CDATA[Universidad Autónoma de Barcelona]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[NS]]></given-names>
</name>
<name>
<surname><![CDATA[Trindade]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Sejpal]]></surname>
<given-names><![CDATA[DV]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determining the indeterminate biliary stricture: cholangioscopy and beyond.]]></article-title>
<source><![CDATA[Curr Gastroenterol Rep]]></source>
<year>2020</year>
<volume>22</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>58</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Tejaswi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical impact of digital cholangioscopy in management of indeterminate biliary strictures and complex biliary stones: a single center study.]]></article-title>
<source><![CDATA[Ther Adv Gastrointestinal Endoscopy]]></source>
<year>2019</year>
<volume>12</volume>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hayat]]></surname>
<given-names><![CDATA[JO]]></given-names>
</name>
<name>
<surname><![CDATA[Loew]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Asrress]]></surname>
<given-names><![CDATA[KN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contrasting liver function test patterns in obstructive jaundice due to biliary strictures and stones]]></article-title>
<source><![CDATA[QJM]]></source>
<year>2005</year>
<volume>98</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>35-40</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wakai]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Shirai]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Sakata]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinicopathological features of benign biliary strictures masquerading as biliary malignancy.]]></article-title>
<source><![CDATA[Am Surg]]></source>
<year>2012</year>
<volume>78</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1388-91</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barroso Márquez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Chao Gonzáles]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Samada Suárez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez Rodríguez]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Tusen Toledo]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez González]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización clínica de pacientes con estenosis de vías biliares diagnosticada por colangiopancreatografía retrógrada endoscópica]]></article-title>
<source><![CDATA[Arch.cuba.gastroenterol]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brizuela]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz Canel]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Pernia]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tratamiento endoscópico de las afecciones obstructivas no litiásicas de la vía biliar principal; resultados en una serie de 1455 casos]]></article-title>
<source><![CDATA[Endoscopia]]></source>
<year>2010</year>
<volume>22</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>171-7</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Arvanitakis]]></surname>
<given-names><![CDATA[VM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Early diagnosis and management of malignant biliary obstruction: A review on current recomendations and guidelines]]></article-title>
<source><![CDATA[Clinical and expermimental gastroenterology]]></source>
<year>2019</year>
<volume>2019</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>415-32</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fairchild]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hohenwalter]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Gipson]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Al-Refaie]]></surname>
<given-names><![CDATA[WB]]></given-names>
</name>
<name>
<surname><![CDATA[Braun]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Crash]]></surname>
<given-names><![CDATA[BD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Appropriateness criteria radiologic management of biliary obstruction]]></article-title>
<source><![CDATA[JACR]]></source>
<year>2019</year>
<volume>16</volume>
<numero>5S</numero>
<issue>5S</issue>
<page-range>196-213</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Qiu]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Hu]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The diagnostic value of five serum tumors markers for patients with cholangiocarcinoma]]></article-title>
<source><![CDATA[Clin Chim Acta]]></source>
<year>2018</year>
<volume>480</volume>
<page-range>186-92</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Bum]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diagnosis of malignant biliary strictures: More is better]]></article-title>
<source><![CDATA[Clin Endosc]]></source>
<year>2018</year>
<volume>51</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>115-7</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Ge]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
<name>
<surname><![CDATA[Wen]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[MRCP combined with CT promotes the differentiation of benign and malignant distal bile ducts strictures]]></article-title>
<source><![CDATA[Front. Oncol]]></source>
<year>2021</year>
<volume>11</volume>
<page-range>683869</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Valenzuela]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Chao]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Barroso]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Colangiopancreatografía por resonancia magnética y colangiopancreatografía retrógrada endoscópica en enfermedades biliopancreáticas]]></article-title>
<source><![CDATA[InvestMedicoquir]]></source>
<year>2018</year>
<volume>10</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Goodchild]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Webstert]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The endoscopist and malignant and non-malignant biliary obstruction.]]></article-title>
<source><![CDATA[Biochim Biophys Acta Mol Basis Dis]]></source>
<year>2018</year>
<volume>1864</volume>
<numero>4Pt B</numero>
<issue>4Pt B</issue>
<page-range>1478-83</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Parsa]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Khashab]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The rol of peroralcholangioscopy in evaluating indeterminate biliary strictures.]]></article-title>
<source><![CDATA[Clinical endoscopy]]></source>
<year>2019</year>
<volume>52</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>556-64</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Crino]]></surname>
<given-names><![CDATA[SF]]></given-names>
</name>
<name>
<surname><![CDATA[Di Mitri]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Nguyen]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Tarantino]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[de Nucci]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Deprez]]></surname>
<given-names><![CDATA[PH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Endoscopic ultrasound-guided fine needle biopsy with or without rapid on-site evaluation for diagnosis of solid pancreatic lesions: a randomized controlled non-inferiority trial]]></article-title>
<source><![CDATA[Gastroenterology]]></source>
<year>2021</year>
<volume>161</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>899-909</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vázquez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Manejo endoscópico instrumental de las estenosis malignas de la vía biliar: ventajas de los nuevos stents]]></article-title>
<source><![CDATA[Cir Andal]]></source>
<year>2019</year>
<volume>30</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>206-12</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matsui]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Nishikawa]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Yukimoto]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Needle tract seeding following endoscopic ultrasound-guided fine-needle aspiration for pancreatic cancer: a report of two cases]]></article-title>
<source><![CDATA[World J Surg Onc]]></source>
<year>2019</year>
<volume>17</volume>
<page-range>134</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chao]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Cepero]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Barroso]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Moret]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mesa]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Valor de la ecoendoscopia en el diagnóstico de las lesiones del tracto gastrointestinal]]></article-title>
<source><![CDATA[InvestMedicoquir]]></source>
<year>2018</year>
<volume>10</volume>
<numero>2</numero>
<issue>2</issue>
</nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hermida]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Nerín]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Cordero]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Mora]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Pinar]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Marcadores tumorales]]></article-title>
<source><![CDATA[Rev Clin Med Fam]]></source>
<year>2016</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>31-42.</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mizuno]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Goto]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Shimojo]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Watanabe]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Tanaka]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical utility of tumor markers.]]></article-title>
<source><![CDATA[Open Journal of pathology]]></source>
<year>2021</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>38-57</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Howland]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Cruz]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Fonseca]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Hidalgo]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Acosta]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Valor diagnóstico de la combinación de nueve marcadores tumorales en neoplasias.]]></article-title>
<source><![CDATA[Qhalikay]]></source>
<year>2017</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>19-28.</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tsen]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Barbara]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rosenkranz]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dilemma of elevated CA 19-9 in biliary pathology]]></article-title>
<source><![CDATA[Pancreatology]]></source>
<year>2018</year>
<volume>18</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>862-7</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
