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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Axial CT images with lung &#40;A&#41; and mediastinal &#40;B&#41; windows showing a well-defined hypodense nodule measuring 13<span class="elsevierStyleHsp" style=""></span>mm in diameter in the right lower lobe&#46; The nodule has fat density &#40;mean density&#44; &#8722;41<span class="elsevierStyleHsp" style=""></span>HU&#41; &#40;C&#41;&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">We read with great interest the letter to the editor from Bacalja et al&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a> who reported the case of a 58-year-old man presenting with a pulmonary mass in the left upper lobe&#46; Left upper lobectomy was performed&#44; with a final diagnosis of intrapulmonary lipoma&#46; The authors commented on the radiologists&#8217; difficulty in determining the nature of the lesion&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">We would like to highlight the role of imaging techniques&#44; particularly computed tomography &#40;CT&#41;&#44; as an important tool in the evaluation of patients with intrapulmonary lipomas&#46; We report the case of a 52-year-old asymptomatic man who was referred after a nodule was detected on a routine chest X-ray&#46; Physical examination and laboratory test results were normal&#46; High-resolution CT showed a well-defined round nodule measuring 13<span class="elsevierStyleHsp" style=""></span>mm in diameter in the right lower lobe&#46; The nodule was hypodense&#44; with a mean density of &#8722;30 Hounsfield units &#40;HU&#41;&#44; compatible with a fat-containing lesion &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; These findings indicated a benign pattern&#44; with CT characteristics consistent with an intrapulmonary lipoma&#46; The patient is currently being monitored in the outpatient clinic&#44; and the nodule remains unchanged after 2 years&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">Lipomas are benign mesenchymal tumors composed of adipose tissue&#46; Although they are a common form of soft-tissue tumor&#44; intrapulmonary lipomas are exceptionally rare&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#44;3</span></a> Most intrapulmonary lipomas are asymptomatic&#44; with the majority being found incidentally on routine radiographs as solitary opacities&#44; indistinguishable on plain films from malignant neoplasms&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#8211;4</span></a> On CT&#44; lipomas present as well-defined&#44; round&#44; homogeneous nodules&#44; with fat attenuation CT values &#40;&#8722;30 to &#8722;150<span class="elsevierStyleHsp" style=""></span>HU&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#8211;4</span></a> The presence of intranodular fat is a reliable indicator of a benign pattern&#44; and the diagnosis of pulmonary lipoma depends heavily on the detection of fat within the lesion&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Magnetic resonance imaging &#40;MRI&#41; also enables the distinction of different lesion components&#44; including fat&#46; On T1-weighted sequences&#44; fat appears as areas of high signal intensity&#46; Contrast-enhanced T1-weighted sequences with fat suppression show signal loss of the fat component&#46; These findings are characteristic of the presence of fat&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#44;5</span></a> The main entity considered in the differential diagnosis of intrapulmonary nodules with fat is hamartoma&#46; These nodules frequently have focal areas of fat alternating with areas of calcification&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">5</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">In conclusion&#44; both CT and MRI can help to identify intranodular fat&#44; a reliable indicator of their benign nature that eliminates the need for invasive procedures&#44; such as pulmonary biopsy or surgery&#46; Although rare&#44; intrapulmonary lipomas should be included in the differential diagnosis of homogeneous fat-containing lesions&#46;</p></span>"
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Letter to the Editor
The Role of Imaging Methods in the Diagnosis of Pulmonary Lipoma
Papel de las pruebas de imagen en el diagnóstico del lipoma pulmonar
Miriam Menna-Barreto, Gláucia Zanetti, Edson Marchiori
Corresponding author
edmarchiori@gmail.com

Corresponding author.
Servicio de Radiología, Federal University of Río de Janeiro, Río de Janeiro, Brazil
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">We read with great interest the letter to the editor from Bacalja et al&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a> who reported the case of a 58-year-old man presenting with a pulmonary mass in the left upper lobe&#46; Left upper lobectomy was performed&#44; with a final diagnosis of intrapulmonary lipoma&#46; The authors commented on the radiologists&#8217; difficulty in determining the nature of the lesion&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">We would like to highlight the role of imaging techniques&#44; particularly computed tomography &#40;CT&#41;&#44; as an important tool in the evaluation of patients with intrapulmonary lipomas&#46; We report the case of a 52-year-old asymptomatic man who was referred after a nodule was detected on a routine chest X-ray&#46; Physical examination and laboratory test results were normal&#46; High-resolution CT showed a well-defined round nodule measuring 13<span class="elsevierStyleHsp" style=""></span>mm in diameter in the right lower lobe&#46; The nodule was hypodense&#44; with a mean density of &#8722;30 Hounsfield units &#40;HU&#41;&#44; compatible with a fat-containing lesion &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; These findings indicated a benign pattern&#44; with CT characteristics consistent with an intrapulmonary lipoma&#46; The patient is currently being monitored in the outpatient clinic&#44; and the nodule remains unchanged after 2 years&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">Lipomas are benign mesenchymal tumors composed of adipose tissue&#46; Although they are a common form of soft-tissue tumor&#44; intrapulmonary lipomas are exceptionally rare&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#44;3</span></a> Most intrapulmonary lipomas are asymptomatic&#44; with the majority being found incidentally on routine radiographs as solitary opacities&#44; indistinguishable on plain films from malignant neoplasms&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#8211;4</span></a> On CT&#44; lipomas present as well-defined&#44; round&#44; homogeneous nodules&#44; with fat attenuation CT values &#40;&#8722;30 to &#8722;150<span class="elsevierStyleHsp" style=""></span>HU&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#8211;4</span></a> The presence of intranodular fat is a reliable indicator of a benign pattern&#44; and the diagnosis of pulmonary lipoma depends heavily on the detection of fat within the lesion&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Magnetic resonance imaging &#40;MRI&#41; also enables the distinction of different lesion components&#44; including fat&#46; On T1-weighted sequences&#44; fat appears as areas of high signal intensity&#46; Contrast-enhanced T1-weighted sequences with fat suppression show signal loss of the fat component&#46; These findings are characteristic of the presence of fat&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">2&#44;5</span></a> The main entity considered in the differential diagnosis of intrapulmonary nodules with fat is hamartoma&#46; These nodules frequently have focal areas of fat alternating with areas of calcification&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">5</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">In conclusion&#44; both CT and MRI can help to identify intranodular fat&#44; a reliable indicator of their benign nature that eliminates the need for invasive procedures&#44; such as pulmonary biopsy or surgery&#46; Although rare&#44; intrapulmonary lipomas should be included in the differential diagnosis of homogeneous fat-containing lesions&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Menna-Barreto M&#44; Zanetti G&#44; Marchiori E&#46; Papel de las pruebas de imagen en el diagn&#243;stico del lipoma pulmonar&#46; Arch Bronconeumol&#46; 2016&#59;52&#58;223&#46;</p>"
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Axial CT images with lung &#40;A&#41; and mediastinal &#40;B&#41; windows showing a well-defined hypodense nodule measuring 13<span class="elsevierStyleHsp" style=""></span>mm in diameter in the right lower lobe&#46; The nodule has fat density &#40;mean density&#44; &#8722;41<span class="elsevierStyleHsp" style=""></span>HU&#41; &#40;C&#41;&#46;</p>"
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ISSN: 15792129
Original language: English
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