<?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>0001-6002</journal-id>
<journal-title><![CDATA[Acta Médica Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. costarric]]></abbrev-journal-title>
<issn>0001-6002</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Médicos y Cirujanos de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0001-60022022000300043</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Recaída de linfoma folicular de alto grado en tiroides]]></article-title>
<article-title xml:lang="en"><![CDATA[Relapse of high grade follicular lymphoma in thyroid]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alburqueque-Melgarejo]]></surname>
<given-names><![CDATA[Joseph]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Roque-Quezada]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dulanto-Moscoso]]></surname>
<given-names><![CDATA[Luis Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Virú-Flores]]></surname>
<given-names><![CDATA[Horus Michael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Ricardo Palma Facultad de Medicina Humana Instituto de Investigaciones en Ciencias Biomédicas]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af1">
<institution><![CDATA[,Universidad Ricardo Palma Facultad de Medicina Humana Instituto de Investigaciones en Ciencias Biomédicas]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro Médico Naval Cirujano Mayor Santiago Távara Departamento de Hematología Clínica ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Privada San Juan Bautista Facultad de Medicina Humana Departamento de Investigación Clínica]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<volume>64</volume>
<numero>3</numero>
<fpage>43</fpage>
<lpage>49</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0001-60022022000300043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0001-60022022000300043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0001-60022022000300043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El linfoma folicular de tiroides es una entidad rara que representa menos del 2% de los linfomas extranodales y cuyo principal factor de riesgo es la tiroiditis de Hashimoto. Suele afectar con mayor predisposición a pacientes adultos mayores, en los que con frecuencia se presenta como una masa de crecimiento rápido con compromiso de las estructuras adyacentes en el cuello. Sin embargo, dada su rara incidencia, esta patología debe ser sospechada por el clínico para un diagnóstico temprano oportuno. Aunque en la actualidad no existen guías de manejo estandarizadas para esta entidad, acostumbra tener buena respuesta a radioterapia y quimioterapia. El presente caso describe la historia de un paciente con una recaída de linfoma no Hodgkin de tipo folicular de alto grado localizado en tiroides que se presentó a urgencias con disfonía, parálisis bilateral de cuerdas vocales, cambio en el tono de la voz y disfagia, con el antecedente de un linfoma folicular de alto grado en localización retroperitoneal y en remisión luego de 8 ciclos de quimioterapia con rituximab, ciclofosfamida, doxorubicina, vincristina y prednisona, el cual presentó citorreducción luego del tratamiento con quimioterapia con el protocolo de rituximab, dexametasona, citarabina y cisplatino.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Follicular thyroid lymphoma is a rare entity that represents less than 2% of extranodal lymphomas; and whose main risk factor is Hashimoto's thyroiditis. This tends to affect older adult patients with greater predisposition, where it usually presents as a rapidly growing mass with compromise of the adjacent structures in the neck. However, given its rare incidence, this pathology should be suspected by the clinician for an early diagnosis. Although there are currently no standardized management guidelines for this entity, it usually responds well to radiotherapy and chemotherapy. The present case describes the history of a patient with a relapse of high-grade follicular-type NHL located in the thyroid who presented to the emergency room with dysphonia, bilateral paralysis of the vocal cords, change in tone of voice and dysphagia, with the history of high-grade follicular lymphoma in retroperitoneal location in remission after 8 cycles of chemotherapy with Rituximab, Cyclophosphamide, Doxorubicin, Vincristine and Prednisone, which presented cytoreduction after treatment with chemotherapy with the protocol Rituximab, Dexamethasone, Cytarabine and Cisplatin.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[linfoma]]></kwd>
<kwd lng="es"><![CDATA[glándula tiroides]]></kwd>
<kwd lng="es"><![CDATA[linfoma folicular]]></kwd>
<kwd lng="es"><![CDATA[recurrencia]]></kwd>
<kwd lng="es"><![CDATA[adulto mayor]]></kwd>
<kwd lng="es"><![CDATA[quimioterapia]]></kwd>
<kwd lng="en"><![CDATA[Lymphoma]]></kwd>
<kwd lng="en"><![CDATA[Thyroid Gland]]></kwd>
<kwd lng="en"><![CDATA[Recurrence]]></kwd>
<kwd lng="en"><![CDATA[Lymphome folliculaire]]></kwd>
<kwd lng="en"><![CDATA[Aged]]></kwd>
<kwd lng="en"><![CDATA[Chemotherapy]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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