<?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>0300-9041</journal-id>
<journal-title><![CDATA[Ginecología y obstetricia de México]]></journal-title>
<abbrev-journal-title><![CDATA[Ginecol. obstet. Méx.]]></abbrev-journal-title>
<issn>0300-9041</issn>
<publisher>
<publisher-name><![CDATA[Federación Mexicana de Colegios de Obstetricia y Ginecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0300-90412020000400010</article-id>
<article-id pub-id-type="doi">10.24245/gom.v88i4.3448</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Duplicación de imagen ultrasonográfica de feto único intrauterino que emula un gemelo inexistente: reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Ultrasonographic image duplication of an intrauterine unique fetus mimicking non-existing twin: case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar López-Ortiz]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Siu-Mogel]]></surname>
<given-names><![CDATA[Gonzalo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar-Trujillo]]></surname>
<given-names><![CDATA[José Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Alvarado]]></surname>
<given-names><![CDATA[Ana Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Teliz-Meneses]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Castro]]></surname>
<given-names><![CDATA[Néstor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Español de México Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Español de México  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Español de México Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Español de México  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital ABC Radiología e Imagen ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Hospital Español de México Departamento de Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>88</volume>
<numero>4</numero>
<fpage>277</fpage>
<lpage>281</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412020000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412020000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412020000400010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  ANTECEDENTES:  En Obstetricia, las imágenes en espejo son artefactos ecográficos infrecuentes que, potencialmente, pueden confundirse con embarazos heterotópicos y propiciar errores diagnósticos e intervenciones iatrógenas. Estas imágenes ficticias se generan por la existencia de una superficie reflectora como, por ejemplo, el intestino distendido o la vejiga repleta.  CASO CLÍNICO:  Paciente de 39 años, con embarazo por fertilización in vitro, que asiste a evaluación ecográfica del primer trimestre. En la ecografía de rutina a las 11 semanas se observó una imagen en espejo y en la resonancia magnética: útero gestante con una estructura retrouterina hipoecoica, sin feto en el interior. La imagen ecográfica en espejo volvió a reproducirse en el tercer trimestre. El embarazo llegó a término y finalizó por vía abdominal, sin que pudieran demostrarse las estructuras que se advirtieron en la resonancia magnética.  CONCLUSIONES:  Las imágenes en espejo se han reportado en ultrasonidos de diversas localizaciones pero pocos en la Obstetricia. Todo hizo suponer que la superficie reflectora fue la estructura hipoecoica retrouterina observada, transitoriamente, en la resonancia magnética.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  BACKGROUND:  In obstetrics, ultrasonic artifactual mirror images are infrequent, but potentially dangerous since they can be mistakenly interpreted as heterotopic pregnancies, precluding diagnostic errors and iatrogenic interventions. These images require a reflection surface such as dilated bowl or plenty bladder to be generated.  OBJECTIVE:  We report a first trimester scan ghost twin, diagnosed since first trimester of pregnancy.  CLINICAL CASE:  39-year-old patient, with pregnancy due to in vitro fertilization, who attends ultrasound evaluation of the first trimester. Routine ultrasound at 11 weeks showed a mirror image and magnetic resonance imaging: a pregnant uterus with a hypoechoic retrouterine structure, with no fetus inside. The ultrasound mirror image reproduced again in the third trimester. The pregnancy came to an end and ended by abdominal route, without being able to demonstrate the structures that were noticed on the MRI.  CONCLUSION:  Very few reports of obstetric ultrasound mirror images have been reported. We hypothesize that the transient retrouterine hypoecogenic structure observed by MRI was the reflective surface that create the ghost twin image.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Embarazo heterotópico]]></kwd>
<kwd lng="es"><![CDATA[primer trimestre del embarazo]]></kwd>
<kwd lng="es"><![CDATA[imagen en espejo]]></kwd>
<kwd lng="es"><![CDATA[fertilización in vitro]]></kwd>
<kwd lng="es"><![CDATA[resonancia magnética]]></kwd>
<kwd lng="en"><![CDATA[Heterotopic pregnancies]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy, Trimester, First]]></kwd>
<kwd lng="en"><![CDATA[Mirror Images]]></kwd>
<kwd lng="en"><![CDATA[In vitro Fertilization]]></kwd>
<kwd lng="en"><![CDATA[Magnetic Resonance Imaging]]></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[Kremkau]]></surname>
<given-names><![CDATA[FW]]></given-names>
</name>
<name>
<surname><![CDATA[Taylor]]></surname>
<given-names><![CDATA[KJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Artifacts in ultrasound imaging]]></article-title>
<source><![CDATA[J Ultrasound Med]]></source>
<year>1986</year>
<volume>5</volume>
<page-range>227-37</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[Feldman]]></surname>
<given-names><![CDATA[MK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[US artifacts]]></article-title>
<source><![CDATA[Radiographics]]></source>
<year>2009</year>
<volume>29</volume>
<numero>4</numero>
<issue>4</issue>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prabhu]]></surname>
<given-names><![CDATA[SJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ultrasound artifacts classification, applied physics with illustrations, and imaging appearances]]></article-title>
<source><![CDATA[Ultrasound Q]]></source>
<year>2014</year>
<volume>30</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>145-57</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[Lim]]></surname>
<given-names><![CDATA[BH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The mirror image artifact of early pregnancy]]></article-title>
<source><![CDATA[Ultrasound Obstet Gynecol]]></source>
<year>2003</year>
<volume>21</volume>
<page-range>518-20</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[Miglietta]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mirror-image artifact of early pregnancy on transvaginal sonography]]></article-title>
<source><![CDATA[J Ultrasound Med]]></source>
<year>2012</year>
<volume>31</volume>
<page-range>1858-9</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[Ahn]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mirror artifacts in obstetric ultrasound case presentation of a ghost twin during the second trimester ultrasound scan]]></article-title>
<source><![CDATA[Fetal Diagn Ther]]></source>
<year>2013</year>
<volume>34</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>248e52</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Malhotra]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mirror image artifact mimicking heterotopic pregnancy on transvaginal ultrasound: case series]]></article-title>
<source><![CDATA[West J Emerg Med]]></source>
<year>2014</year>
<volume>15</volume>
<numero>6</numero>
<issue>6</issue>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Russell]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Apparent Heterotopic Pregnancy Created by Mirror Image Artifact]]></article-title>
<source><![CDATA[J Obstet Gynaecol Can]]></source>
<year>2017</year>
<volume>39</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>961-2</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[Ahmed]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Just a mirage: heterotopic intrauterine and twin ectopic pregnancy mimicked by mirror imaging on ultrasound]]></article-title>
<source><![CDATA[Radiol Case Rep]]></source>
<year>2017</year>
<volume>12</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>422-6</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[Arning]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Eckert]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The diagnostic relevance of colour Doppler artefacts in carotid artery examinations]]></article-title>
<source><![CDATA[Eur J Radiol]]></source>
<year>2004</year>
<volume>51</volume>
<page-range>246-51</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[Goettler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heterotopic Pregnancy]]></article-title>
<source><![CDATA[N Engl J Med]]></source>
<year>2016</year>
<volume>375</volume>
<numero>20</numero>
<issue>20</issue>
<page-range>1982</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
