Corresponding author at: Laboratorio Clínico, Clínica Alemana, Av. Vitacura 5951, Santiago, Chile.
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"apellidos" => "Zanrosso" ] 2 => array:2 [ "nombre" => "Leandro Luis" "apellidos" => "Corso" ] 3 => array:2 [ "nombre" => "Lessandra" "apellidos" => "Michelin" ] 4 => array:2 [ "nombre" => "Jonathan" "apellidos" => "Soldera" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1413867019304714?idApp=UINPBA00003Y" "url" => "/14138670/0000002300000006/v3_202002111852/S1413867019304714/v3_202002111852/en/main.assets" ] "en" => array:15 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Clinical image</span>" "titulo" => "Ghost tablets mimicking intestinal parasite" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "462" "paginaFinal" => "463" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Lorena Porte, Thomas Weitzel" "autores" => array:2 [ 0 => array:3 [ "nombre" => "Lorena" "apellidos" => "Porte" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 1 => array:4 [ "nombre" => "Thomas" "apellidos" => "Weitzel" "email" => array:1 [ 0 => "tweitzel@alemana.cl" ] "referencia" => array:3 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] 2 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] ] "afiliaciones" => array:2 [ 0 => array:3 [ "entidad" => "Universidad del Desarrollo, Facultad de Medicina Clínica Alemana, Clínica Alemana, Laboratorio Clínico, Santiago, Chile" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Universidad del Desarrollo, Facultad de Medicina Clínica Alemana, Instituto de Ciencias e Innovación en Medicina (ICIM), Santiago, Chile" "etiqueta" => "b" "identificador" => "aff0010" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "<span class="elsevierStyleItalic">Corresponding author at</span>: Laboratorio Clínico, Clínica Alemana, Av. Vitacura 5951, Santiago, Chile." ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1064 "Ancho" => 1300 "Tamanyo" => 150377 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at0090" "detalle" => "Fig. " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Macroscopic appearance of metformin XR remainders (ghost tablets) as soft amorphous masses in fecal samples mimicking parasitic elements.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">A 67-year old man and a 71-year old woman consulted for the repeated shedding of bean-sized elements in their stools. Although not suffering from gastrointestinal complaints, both patients were worried and feared to be infested by intestinal parasites. The attending physicians suspected of helminth infection and ordered parasitological examinations of the fecal elements.</p><p id="par0010" class="elsevierStylePara elsevierViewall">Submitted samples contained cuboid structures of yellowish to brown color, measuring approximately 2.5<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>1.0<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>1.0<span class="elsevierStyleHsp" style=""></span>cm (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>). Due to the soft consistency and lack of internal structures, we suspected that the amorphous elements represented so called “ghost tablets”, which are the remainders of long-acting medications. On request, both patients confirmed to recent prescription of extended release (XR) metformin. These formulations have to be swallowed whole and can remain intact during gastrointestinal transit. According to the product information, they can present as soft, hydrated masses in feces, which does not affect the efficacy of the drug. Ghost tablets appear in up to 54 % of those taking XR metformin<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> and, in patients with psychiatric disorders, might lead to anxiety and paranoia, especially if caretakers are unaware of the phenomenon.<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> Due to the lack of information and education regarding this harmless side effect, the topic is frequently discussed in internet forums or medical lay press articles.<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3–5</span></a> In Chile and other countries with endemic tapeworm infections, ghost pills might cause additional confusion, since their size and shape might resemble <span class="elsevierStyleItalic">Taenia</span> proglottids. In our parasitology laboratory, several of such samples have been submitted in recent years, all representing metformin XR formulations. Physicians should inform patients using metformin XR about this harmless side effect to avoid unnecessary anxiety and exams. Infectious diseases specialists and microbiologists should be familiar with the phenomenon of ghost tablets in patients reporting the shedding of suspicious stool elements.</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflict of interest</span><p id="par0015" class="elsevierStylePara elsevierViewall">The authors declare no conflicts of interest.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0005" "titulo" => "Conflict of interest" ] 1 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2019-09-17" "fechaAceptado" => "2019-10-17" "multimedia" => array:1 [ 0 => array:8 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1064 "Ancho" => 1300 "Tamanyo" => 150377 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at0090" "detalle" => "Fig. " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Macroscopic appearance of metformin XR remainders (ghost tablets) as soft amorphous masses in fecal samples mimicking parasitic elements.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:5 [ 0 => array:3 [ "identificador" => "bib0005" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Assessment of efficacy and tolerability of once-daily extended release metformin in patients with type 2 diabetes mellitus" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "J. Levy" 1 => "R.A. Cobas" 2 => "M.B. Gomes" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:4 [ "tituloSerie" => "Diabetol Metab Syndr." "fecha" => "2010" "volumen" => "2" "paginaInicial" => "16" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0010" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Curse of the ghost pills: the role of oral controlled-release formulations in the passage of empty intact shells in faeces. Two case reports and a literature review relevant to psychiatry" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "T.E. Tungaraza" 1 => "P. Talapan-Manikoth" 2 => "R. Jenkins" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1177/2042098612474681" "Revista" => array:6 [ "tituloSerie" => "Ther Adv Drug Saf." "fecha" => "2013" "volumen" => "4" "paginaInicial" => "63" "paginaFinal" => "71" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/25083252" "web" => "Medline" ] ] ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib0015" "etiqueta" => "3" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "Diabetes in Control. Ghost Pills. Available under: <a target="_blank" href="http://www.diabetesincontrol.com/ghost-pills">http://www.diabetesincontrol.com/ghost-pills</a> (accessed 12 September 2019)." ] ] ] 3 => array:3 [ "identificador" => "bib0020" "etiqueta" => "4" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "National Alliance for Mental Illness. Frequent questions: I occasionally see what looks like medicine in the stool. Available under: <a target="_blank" href="https://www.nami.org/FAQ/Mental-Health-Medication-FAQ/I-occasionally-see-what-looks-like-medicine-in-the">https://www.nami.org/FAQ/Mental-Health-Medication-FAQ/I-occasionally-see-what-looks-like-medicine-in-the</a> (accessed 12 September 2019)." ] ] ] 4 => array:3 [ "identificador" => "bib0025" "etiqueta" => "5" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "Sissons C. What causes white specks in my poop? MedicalNewToday. Available under: <a target="_blank" href="https://www.medicalnewstoday.com/articles/321280.php">https://www.medicalnewstoday.com/articles/321280.php</a> (accessed 12 September 2019)." ] ] ] ] ] ] ] ] "idiomaDefecto" => "en" "url" => "/14138670/0000002300000006/v3_202002111852/S1413867019304726/v3_202002111852/en/main.assets" "Apartado" => array:4 [ "identificador" => "19366" "tipo" => "SECCION" "en" => array:2 [ "titulo" => "Clinical Image" "idiomaDefecto" => true ] "idiomaDefecto" => "en" ] "PDF" => "https://static.elsevier.es/multimedia/14138670/0000002300000006/v3_202002111852/S1413867019304726/v3_202002111852/en/main.pdf?idApp=UINPBA00003Y&text.app=https://bjid.org.br/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1413867019304726?idApp=UINPBA00003Y" ]
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