<?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>1657-9534</journal-id>
<journal-title><![CDATA[Colombia Médica]]></journal-title>
<abbrev-journal-title><![CDATA[Colomb. Med.]]></abbrev-journal-title>
<issn>1657-9534</issn>
<publisher>
<publisher-name><![CDATA[Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1657-95342025000200007</article-id>
<article-id pub-id-type="doi">10.25100/cm.v56i2.6672</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Abdominal actinomycosis by Actinomyces shaaliae georgiae mimicking neoplasia]]></article-title>
<article-title xml:lang="es"><![CDATA[Actinomicosis abdominal por Actinomyces shaaliae georgiae que simula una neoplasia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Londoño Barrientos]]></surname>
<given-names><![CDATA[Mateo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopez Zapata]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Herrera]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Frusteri]]></surname>
<given-names><![CDATA[Marco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado Lopez]]></surname>
<given-names><![CDATA[Carlos Andres]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Escuela de Ingeniería de Antioquia  ]]></institution>
<addr-line><![CDATA[Envigado ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Pablo Tobón Uribe  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2025</year>
</pub-date>
<volume>56</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1657-95342025000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1657-95342025000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1657-95342025000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Case Description: We report the case of a 77-year-old male who presented with a three-week history of constitutional symptoms, accompanied by an indurated epigastric mass measuring 10 × 7 cm with a 4 cm phlyctenae, exhibiting local and systemic inflammatory responses.  Clinical Findings: Abdominal computed tomography demonstrated focal thickening of the transverse colon with a poorly defined inflammatory lesion extending to the abdominal wall and a collection suggestive of colo-cutaneous fistula. The clinical and imaging findings raised a strong suspicion of malignancy. Microbiological culture from drainage material isolated Actinomyces shaaliae georgiae, further reinforcing the suspicion of neoplastic disease due to the tumor-like presentation.  Treatment and Outcomes: Initial management included antimicrobial therapy and percutaneous drainage. Surgical exploration revealed a stony hard mass without cleavage planes, adherent to adjacent organs. Histopathological examination excluded malignancy, confirming an infectious process caused by A. shaaliae georgiae. The patient received prolonged antibiotic therapy, resulting in a favorable clinical outcome.  Clinical Relevance: To our knowledge, this represents the first reported case of abdominal actinomycosis caused by A. shaaliae georgiae with this unique presentation. Actinomycotic lesions form purulent foci surrounded by extensive fibrosis, creating tumor-like masses that clinically and radiologically mimic neoplastic processes. This case expands the clinical spectrum and microbiological repertoire of A. shaaliae georgiae, emphasizing the critical importance of maintaining high clinical suspicion, implementing multidisciplinary diagnostic approaches, and ensuring appropriate antimicrobial management in abdominal actinomycosis to avoid unnecessary surgical interventions and improve patient outcomes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Descripción del Caso: Reportamos el caso de un hombre de 77 años quien presentó un cuadro de tres semanas de evolución con síntomas constitucionales, acompañado de masa epigástrica indurada de 10 × 7 cm con flictena de 4 cm, exhibiendo respuesta inflamatoria local y sistémica.  Hallazgos Clínicos: La tomografía computarizada abdominal demostró engrosamiento focal del colon transverso con lesión inflamatoria pobremente definida que se extendía hacia la pared abdominal y colección sugestiva de fístula colocutánea. Los hallazgos clínicos e imagenológicos generaron una fuerte sospecha de malignidad. El cultivo microbiológico del material de drenaje aisló Actinomyces shaaliae georgiae, reforzando la sospecha de proceso neoplásico debido a la presentación pseudotumoral.  Tratamiento y Resultados: El manejo inicial incluyó terapia antimicrobiana y drenaje percutáneo. La exploración quirúrgica reveló masa pétrea sin planos de clivaje, adherida a órganos adyacentes. El examen histopatológico descartó malignidad, confirmando proceso infeccioso por A. shaaliae georgiae. El paciente recibió antibioticoterapia prolongada con evolución clínica favorable.  Relevancia Clínica: Este representa, hasta donde conocemos, el primer caso reportado de actinomicosis abdominal causada por A. shaaliae georgiae con esta presentación singular. Las lesiones actinomicóticas forman focos purulentos rodeados de fibrosis extensa, creando masas pseudotumorales que clínica y radiológicamente simulan procesos neoplásicos. Este caso amplía el espectro clínico y repertorio microbiológico de A. shaaliae georgiae, enfatizando la importancia crítica de mantener alta sospecha clínica, implementar abordajes diagnósticos multidisciplinarios y asegurar manejo antimicrobiano apropiado en actinomicosis abdominal para evitar intervenciones quirúrgicas innecesarias y mejorar desenlaces clínicos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Actinomyces]]></kwd>
<kwd lng="en"><![CDATA[Actinomycosis]]></kwd>
<kwd lng="en"><![CDATA[Actinomyces georgiae]]></kwd>
<kwd lng="es"><![CDATA[Actinomyces]]></kwd>
<kwd lng="es"><![CDATA[Actinomicosis]]></kwd>
<kwd lng="es"><![CDATA[Actinomyces georgiae]]></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[Wong]]></surname>
<given-names><![CDATA[VK]]></given-names>
</name>
<name>
<surname><![CDATA[Turmezei]]></surname>
<given-names><![CDATA[TD]]></given-names>
</name>
<name>
<surname><![CDATA[Weston]]></surname>
<given-names><![CDATA[VC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Actinomycosis]]></article-title>
<source><![CDATA[BMJ]]></source>
<year>2011</year>
<volume>343</volume>
<page-range>6099</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[Valour]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Sénéchal]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Dupieux]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Karsenty]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lustig]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Breton]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Actinomycosis etiology, clinical features, diagnosis, treatment, and management]]></article-title>
<source><![CDATA[Infect Drug Resist]]></source>
<year>2014</year>
<volume>7</volume>
<page-range>183-97</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Könönen]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Wade]]></surname>
<given-names><![CDATA[WG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Actinomyces and related organisms in human infections]]></article-title>
<source><![CDATA[Clin Microbiol Rev]]></source>
<year>2015</year>
<volume>28</volume>
<page-range>419-42</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[Lewis]]></surname>
<given-names><![CDATA[RP]]></given-names>
</name>
<name>
<surname><![CDATA[Sutter]]></surname>
<given-names><![CDATA[VL]]></given-names>
</name>
<name>
<surname><![CDATA[Finegold]]></surname>
<given-names><![CDATA[SM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bone infections involving anaerobic bacteria]]></article-title>
<source><![CDATA[Medicine (Baltimore)]]></source>
<year>1978</year>
<volume>57</volume>
<page-range>279-305</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[Mabeza]]></surname>
<given-names><![CDATA[GF]]></given-names>
</name>
<name>
<surname><![CDATA[Macfarlane]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pulmonary actinomycosis]]></article-title>
<source><![CDATA[Eur Respir J]]></source>
<year>2003</year>
<volume>21</volume>
<page-range>545-51</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bennett]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Dolin]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Blaser]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Mandell, Douglas, Bennett's principles and practice of infectious diseases]]></source>
<year>2019</year>
<edition>Ninth</edition>
<publisher-name><![CDATA[Elsevier health sciences]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Heo]]></surname>
<given-names><![CDATA[SH]]></given-names>
</name>
<name>
<surname><![CDATA[Shin]]></surname>
<given-names><![CDATA[SS]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
<name>
<surname><![CDATA[Lim]]></surname>
<given-names><![CDATA[HS]]></given-names>
</name>
<name>
<surname><![CDATA[Seon]]></surname>
<given-names><![CDATA[HJ]]></given-names>
</name>
<name>
<surname><![CDATA[Jung]]></surname>
<given-names><![CDATA[SI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Imaging of actinomycosis in various organs a comprehensive review]]></article-title>
<source><![CDATA[Radiographics]]></source>
<year>2014</year>
<volume>34</volume>
<page-range>19-33</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Triantopoulou]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[der Molen]]></surname>
<given-names><![CDATA[AV]]></given-names>
</name>
<name>
<surname><![CDATA[Es]]></surname>
<given-names><![CDATA[ACV]]></given-names>
</name>
<name>
<surname><![CDATA[Giannila]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abdominopelvic actinomycosis spectrum of imaging findings and common mimickers]]></article-title>
<source><![CDATA[Acta Radiol Short Rep]]></source>
<year>2014</year>
<volume>3</volume>
<page-range>2047981614524570</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[Sung]]></surname>
<given-names><![CDATA[HY]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[IS]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[SI]]></given-names>
</name>
<name>
<surname><![CDATA[Jung]]></surname>
<given-names><![CDATA[SE]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[SW]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[SY]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical features of abdominal actinomycosis A 15-year experience of a single institute]]></article-title>
<source><![CDATA[J Korean Med Sci]]></source>
<year>2011</year>
<volume>26</volume>
<page-range>932-7</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[Rahimkhani]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mordadi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kazemian]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Khalili]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of Helicobacter pylori detection methods It&amp;apos;s association with leukocytosis and monocytosis]]></article-title>
<source><![CDATA[Infectious Disorders Drug Targets]]></source>
<year>2020</year>
<volume>20</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>920-4</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[Choi]]></surname>
<given-names><![CDATA[M-M]]></given-names>
</name>
<name>
<surname><![CDATA[Baek]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[JN]]></given-names>
</name>
<name>
<surname><![CDATA[Park]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[W-S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical features of abdominopelvic actinomycosis report of twenty cases and literature review]]></article-title>
<source><![CDATA[Yonsei Med J]]></source>
<year>2009</year>
<volume>50</volume>
<page-range>555-9</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[Vasilescu]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Târcoveanu]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Lupascu]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Blaj]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lupascu Ursulescu]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Bradea]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abdominopelvic Actinomycosis-the diagnostic and therapeutic challenge of the most misdiagnosed disease]]></article-title>
<source><![CDATA[Life]]></source>
<year>2022</year>
<volume>12</volume>
<page-range>447</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arslan]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[Koca]]></surname>
<given-names><![CDATA[YS]]></given-names>
</name>
<name>
<surname><![CDATA[Beyoglu]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Yenipazar]]></surname>
<given-names><![CDATA[AE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Appendecular actinomycosis A case series of 14 patients]]></article-title>
<source><![CDATA[Med Clin (Barc)]]></source>
<year>2024</year>
<volume>162</volume>
<page-range>500-4</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
