Letter to the Director
Diagnostic Difficulties in Hemorrhagic Hereditary Telangiectasia Presenting With Respiratory Failure and a De Novo Mutation in ENG Gene
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HFNC: high-flow nasal cannula.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Salvador Díaz Lobato, José Manuel Carratalá Perales, Guillermo Montiel, José Miguel Alonso Íñigo" "autores" => array:4 [ 0 => array:2 [ "nombre" => "Salvador" "apellidos" => "Díaz Lobato" ] 1 => array:2 [ "nombre" => "José Manuel" "apellidos" => "Carratalá Perales" ] 2 => array:2 [ "nombre" => "Guillermo" "apellidos" => "Montiel" ] 3 => array:2 [ "nombre" => "José Miguel" "apellidos" => "Alonso Íñigo" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0300289623003137?idApp=UINPBA00003Z" "url" => "/03002896/0000006000000002/v3_202406051408/S0300289623003137/v3_202406051408/en/main.assets" ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Letter to the Director</span>" "titulo" => "Diagnostic Difficulties in Hemorrhagic Hereditary Telangiectasia Presenting With Respiratory Failure and a <span class="elsevierStyleItalic">De Novo</span> Mutation in ENG Gene" "tieneTextoCompleto" => true "saludo" => "To the Director," "paginas" => array:1 [ 0 => array:1 [ "paginaInicial" => "124" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Alfonso Gutiérrez-Macías, Begoña Salinas-Lasa, Julen Agirre-Castillero" "autores" => array:3 [ 0 => array:4 [ "nombre" => "Alfonso" "apellidos" => "Gutiérrez-Macías" "email" => array:1 [ 0 => "alguma6725@outlook.es" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] 1 => array:3 [ "nombre" => "Begoña" "apellidos" => "Salinas-Lasa" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] ] ] 2 => array:3 [ "nombre" => "Julen" "apellidos" => "Agirre-Castillero" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] ] "afiliaciones" => array:2 [ 0 => array:3 [ "entidad" => "Department of Internal Medicine, Basurto University Hospital, Bilbao, Spain" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Department of Respiratory Medicine, Basurto University Hospital, Bilbao, Spain" "etiqueta" => "b" "identificador" => "aff0010" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Hemorrhagic hereditary telangiectasia (HHT) is a hereditary autosomal dominant disease associated with mutations in the genes encoding endoglin (ENG) and ALK1 receptor (ACVRL1). Loss of function of these proteins results in altered angiogenesis that leads to formation of vascular malformations in different organs, including the lungs. The development of pulmonary arteriovenous malformations (PAVMs) can lead to a right-to-left shunt, which impairs gas exchange causing hypoxemia, and puts the patients at risk of severe neurological complications.<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">1</span></a> We present the case of a 15-year-old female who developed hypoxemic respiratory failure due to a right-to-left shunt related to multiple PAVMs, that was eventually diagnosed of HHT with a <span class="elsevierStyleItalic">de novo</span> mutation in ENG gene and discuss the diagnostic difficulties in pediatric and adolescent patients, especially when family history is absent.</p><p id="par0010" class="elsevierStylePara elsevierViewall">We present the case of a 15-year-old female without family or personal history of interest, except for isolated episodes of mild epistaxis in her early childhood. She presented with a 2-year history of worsening exertional dyspnea and fatigue. Physical examination revealed a baseline O<span class="elsevierStyleInf">2</span> saturation measured by pulse oximetry of 88% and 2 lingual telangiectasias. Arterial blood gas values were in the range of respiratory failure. Chest X-ray, lung function tests, electrocardiogram, and echocardiogram were normal. Thoracic computed tomography (CT) without contrast showed multiple bilateral nodular opacities. A new echocardiogram with contrast confirmed the passage of multiple bubbles into the left heart chambers. CT angiography of the pulmonary arteries revealed the presence of multiple bilateral PAVMs. Selective embolization of the larger PAVMs was performed using coils and microvascular plugs, with good angiographic results and clinical improvement. Genetic study showed the variants c.279_280delinsGGA and c.284T>G in ENG, not described in the literature but classified as probably pathogenic and of uncertain significance, respectively. Neither of the variants was found in the study of her parents.</p><p id="par0015" class="elsevierStylePara elsevierViewall">Diagnosis of HHT is based on the Curaçao criteria, which include (1) spontaneous and recurrent epistaxis, (2) telangiectasia, (3) family history, and (4) visceral vascular malformations. It is considered “definite” if at least 3 of the 4 criteria are fulfilled and “probable” if at least two are present. If only 1 criterion is present the diagnosis is considered “unlikely”.<a class="elsevierStyleCrossRefs" href="#bib0045"><span class="elsevierStyleSup">2,3</span></a> Many clinical manifestations of HHT develop with age, therefore the Curaçao criteria are not as helpful in children and adolescents as they are in adults.<a class="elsevierStyleCrossRefs" href="#bib0055"><span class="elsevierStyleSup">4,5</span></a> On the other hand, it has been noticed that a significant proportion of patients with genetically confirmed HHT, with or without PAVMs, do not meet diagnostic criteria for definite HHT.<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">6</span></a> In these cases, family history may provide an important clue for early diagnosis. Due to limitations of Curaçao criteria, especially in children and adolescents, current guidelines advocate genetic testing in patients with one or more PAVMs, even in the absence of family history.<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">6,7</span></a> Our case represents a very unusual presentation of HHT with isolated respiratory failure, without family history, significant epistaxis, or evident telangiectasia, and highlights the importance of considering HHT in the differential diagnosis of patients with PAVMs.</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Funding</span><p id="par0020" class="elsevierStylePara elsevierViewall">This research did not receive any specific grant from funding agencies in the public commercial, or not-for-profit sectors.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Conflict of interest</span><p id="par0025" class="elsevierStylePara elsevierViewall">The authors declare to have no conflict of interest directly or indirectly related to the manuscript content.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0005" "titulo" => "Funding" ] 1 => array:2 [ "identificador" => "sec0010" "titulo" => "Conflict of interest" ] 2 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:7 [ 0 => array:3 [ "identificador" => "bib0040" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The lung in hereditary hemorrhagic telangiectasia" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "S. 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