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The Halo Sign in Computed Tomography Images: Differential Diagnosis and Correlation With Pathology Findings
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Parrón, Servicio de Radiodiagnóstico, Hospital Universitario La Paz, P.° de la Castellana, 261, 28046 Madrid, Spain" ] ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2007-09-05" "fechaAceptado" => "2007-10-16" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Key words" "identificador" => "xpalclavsec155320" "palabras" => array:8 [ 0 => "Lung" 1 => "Computed tomography" 2 => "CT" 3 => "Lung Infection" 4 => "Lung tumors" 5 => "Pulmonary nodule" 6 => "Aspergillosis" 7 => "Image findings" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:1 [ "resumen" => "<p class="elsevierStyleSimplePara elsevierViewall">The halo sign is a circular area of ground-glass attenuation that is seen around pulmonary nodules at computed tomography (CT). Although the sign is most often an indication of pulmonary hemorrhage, it may also accompany other lesions associated with different disease processes. Examples are hemorrhagic nodules of infectious origin (mucormycosis, candidiasis, tuberculosis, viral pneumonia, and invasive aspergillosis—the last being the most common cause of the CT halo sign); hemorrhagic nodules of noninfectious origin (Wegener granulomatosis, Kaposi sarcoma, and hemorrhagic metastases); tumor cell infiltration (bronchioloalveolar carcinoma, lymphoma, and metastasis with intra-alveolar tumor growth); and nonhemorrhagic lesions (sarcoidosis and organizing pneumonia). Diagnosis must therefore be based on careful consideration of all the CT chest findings within the context of the patient's clinical state. The aim of this review was to describe and illustrate different disease processes that appear as a halo sign on CT scans, to analyze the value of this diagnostic tool, and to assess its correlation with pathology findings.</p><p class="elsevierStyleSimplePara elsevierViewall">El signo del halo consiste en un área circular de atenuación en vidrio deslustrado que rodea un nodulo pulmonar. Aunque la causa mas frecuente es la hemorragia pulmonar, dicho signo se asocia a numerosas entidades, que corresponden a diferentes procesos anatomopatológicos: nódulos hemorrágicos de etiologia infecciosa (aspergilosis invasiva —la causa más frecuente de nódulos pulmonares con halo—, mucormicosis, candidiasis, tuberculosis, neumonías víricas), nódulos hemorragicos de etiologia no infecciosa (granulomatosis de Wegener, sarcoma de Kaposi, metástasis hemorrágicas), nódulos con halo debido a infiltración de células neoplásicas (carcinoma bronquioloalveolar, linfoma, metástasis con crecimiento tumoral intraalveolar) y nódulos con halo debido a lesiones inflamatorias no hemorrágicas (sarcoidosis, neumonía organizada). Por lo tanto, el diagnóstico debe realizarse integrando todos los hallazgos de la tomografía computarizada de tórax en el contexto clínico del paciente. El objetivo de la presente revisión es describir e ilustrar enfermedades que pueden manifestarse como nódulos pulmonares con el signo del halo, analizando su utilidad diagnóstica y discutiendo su correlación radiopatológica.</p>" ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:1 [ "bibliografiaReferencia" => array:41 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Invasive pulmonary aspergillosis in acute leukemia: characteristic findings on CT, the CT halo sign, and the role of CT in early diagnosis" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "JE Kuhlman" 1 => "EK Fishman" 2 => "SS Siegelman" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1148/radiology.157.3.3864189" "Revista" => array:6 [ "tituloSerie" => "Radiology" "fecha" => "1985" "volumen" => "157" "paginaInicial" => "611" 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| 2021 September | 150 | 73 | 223 |
| 2021 August | 149 | 58 | 207 |
| 2021 July | 190 | 60 | 250 |
| 2021 June | 253 | 57 | 310 |
| 2021 May | 253 | 67 | 320 |
| 2021 April | 492 | 98 | 590 |
| 2021 March | 353 | 54 | 407 |
| 2021 February | 257 | 49 | 306 |
| 2021 January | 216 | 46 | 262 |
| 2020 December | 236 | 45 | 281 |
| 2020 November | 188 | 45 | 233 |
| 2020 October | 100 | 20 | 120 |
| 2020 September | 164 | 16 | 180 |
| 2020 August | 157 | 20 | 177 |
| 2020 July | 253 | 36 | 289 |
| 2020 June | 295 | 24 | 319 |
| 2020 May | 169 | 39 | 208 |
| 2020 April | 148 | 33 | 181 |
| 2020 March | 122 | 18 | 140 |
| 2020 February | 92 | 43 | 135 |
| 2020 January | 69 | 34 | 103 |
| 2019 December | 61 | 17 | 78 |
| 2019 November | 21 | 20 | 41 |
| 2019 October | 12 | 9 | 21 |
| 2019 September | 15 | 15 | 30 |
| 2019 August | 24 | 17 | 41 |
| 2019 July | 26 | 28 | 54 |
| 2019 June | 20 | 5 | 25 |
| 2019 May | 21 | 16 | 37 |
| 2019 April | 59 | 14 | 73 |
| 2019 March | 15 | 15 | 30 |
| 2019 February | 13 | 24 | 37 |
| 2019 January | 7 | 14 | 21 |
| 2018 December | 9 | 15 | 24 |
| 2018 November | 11 | 26 | 37 |
| 2018 October | 23 | 25 | 48 |
| 2018 September | 13 | 18 | 31 |
| 2018 May | 2 | 3 | 5 |
| 2018 April | 13 | 12 | 25 |
| 2018 March | 3 | 4 | 7 |
| 2018 February | 6 | 12 | 18 |
| 2018 January | 4 | 8 | 12 |
| 2017 December | 4 | 10 | 14 |
| 2017 November | 4 | 22 | 26 |
| 2017 October | 5 | 29 | 34 |
| 2017 September | 3 | 36 | 39 |
| 2017 August | 8 | 48 | 56 |
| 2017 July | 3 | 22 | 25 |
| 2017 June | 10 | 42 | 52 |
| 2017 May | 5 | 26 | 31 |
| 2017 April | 3 | 23 | 26 |
| 2017 March | 4 | 19 | 23 |
| 2017 February | 1 | 44 | 45 |
| 2017 January | 5 | 17 | 22 |
| 2016 December | 9 | 15 | 24 |
| 2016 November | 17 | 18 | 35 |
| 2016 October | 12 | 16 | 28 |
| 2016 September | 30 | 36 | 66 |
| 2016 August | 28 | 17 | 45 |
| 2016 July | 18 | 20 | 38 |
| 2016 March | 3 | 0 | 3 |
| 2015 December | 2 | 0 | 2 |
| 2015 November | 2 | 2 | 4 |
| 2015 October | 364 | 2 | 366 |
| 2015 September | 423 | 37 | 460 |
| 2015 August | 400 | 42 | 442 |
| 2015 July | 512 | 36 | 548 |
| 2015 June | 385 | 23 | 408 |
| 2015 May | 406 | 37 | 443 |
| 2015 April | 348 | 34 | 382 |
| 2015 March | 452 | 32 | 484 |
| 2015 February | 364 | 26 | 390 |
| 2015 January | 431 | 27 | 458 |
| 2014 December | 477 | 26 | 503 |
| 2014 November | 597 | 25 | 622 |
| 2014 October | 614 | 41 | 655 |
| 2014 September | 576 | 38 | 614 |
| 2014 August | 605 | 44 | 649 |
| 2014 July | 520 | 27 | 547 |
| 2014 June | 482 | 29 | 511 |
| 2014 May | 509 | 21 | 530 |
| 2014 April | 545 | 29 | 574 |
| 2014 March | 496 | 23 | 519 |
| 2014 February | 427 | 22 | 449 |
| 2014 January | 204 | 12 | 216 |
| 2013 December | 140 | 16 | 156 |
| 2013 November | 126 | 17 | 143 |
| 2013 October | 121 | 22 | 143 |
| 2013 September | 106 | 16 | 122 |
| 2013 August | 108 | 22 | 130 |
| 2013 July | 66 | 18 | 84 |
| 2013 June | 75 | 16 | 91 |
| 2013 May | 80 | 8 | 88 |
| 2013 April | 45 | 6 | 51 |
| 2013 March | 13 | 3 | 16 |
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