The halo sign: HRCT findings in 85 patients
ABSTRACT Objective: The halo sign consists of an area of ground-glass opacity surrounding pulmonary lesions on chest CT scans. We compared immunocompetent and immunosuppressed patients in terms of halo sign features and sought to identify those of greatest diagnostic value. Methods: This was a retrospective study of CT scans performed at any of seven centers between January of 2011 and May of 2015. Patients were classified according to their immune status. Two thoracic radiologists reviewed the scans in order to determine the number of lesions, as well as their distribution, size, and contour, together with halo thickness and any other associated findings. Results: Of the 85 patients evaluated, 53 were immunocompetent and 32 were immunosuppressed. Of the 53 immunocompetent patients, 34 (64%) were diagnosed with primary neoplasm. Of the 32 immunosuppressed patients, 25 (78%) were diagnosed with aspergillosis. Multiple and randomly distributed lesions were more common in the immunosuppressed patients than in the immunocompetent patients (p < 0.001 for both). Halo thickness was found to be greater in the immunosuppressed patients (p < 0.05). Conclusions: Etiologies of the halo sign differ markedly between immunocompetent and immunosuppressed patients. Although thicker halos are more likely to occur in patients with infectious diseases, the number and distribution of lesions should also be taken into account when evaluating patients presenting with the halo sign.
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Sociedade Brasileira de Pneumologia e Tisiologia
2016
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oai:scielo:S1806-371320160006004352017-01-04The halo sign: HRCT findings in 85 patientsAlves,Giordano Rafael TroncoMarchiori,EdsonIrion,KlausNin,Carlos SchulerWatte,GuilhermePasqualotto,Alessandro ComarúSevero,Luiz CarlosHochhegger,Bruno Tomography, X-ray computed Aspergillosis Lung neoplasms ABSTRACT Objective: The halo sign consists of an area of ground-glass opacity surrounding pulmonary lesions on chest CT scans. We compared immunocompetent and immunosuppressed patients in terms of halo sign features and sought to identify those of greatest diagnostic value. Methods: This was a retrospective study of CT scans performed at any of seven centers between January of 2011 and May of 2015. Patients were classified according to their immune status. Two thoracic radiologists reviewed the scans in order to determine the number of lesions, as well as their distribution, size, and contour, together with halo thickness and any other associated findings. Results: Of the 85 patients evaluated, 53 were immunocompetent and 32 were immunosuppressed. Of the 53 immunocompetent patients, 34 (64%) were diagnosed with primary neoplasm. Of the 32 immunosuppressed patients, 25 (78%) were diagnosed with aspergillosis. Multiple and randomly distributed lesions were more common in the immunosuppressed patients than in the immunocompetent patients (p < 0.001 for both). Halo thickness was found to be greater in the immunosuppressed patients (p < 0.05). Conclusions: Etiologies of the halo sign differ markedly between immunocompetent and immunosuppressed patients. Although thicker halos are more likely to occur in patients with infectious diseases, the number and distribution of lesions should also be taken into account when evaluating patients presenting with the halo sign.info:eu-repo/semantics/openAccessSociedade Brasileira de Pneumologia e TisiologiaJornal Brasileiro de Pneumologia v.42 n.6 20162016-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132016000600435en10.1590/s1806-37562015000000029 |
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Alves,Giordano Rafael Tronco Marchiori,Edson Irion,Klaus Nin,Carlos Schuler Watte,Guilherme Pasqualotto,Alessandro Comarú Severo,Luiz Carlos Hochhegger,Bruno |
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Alves,Giordano Rafael Tronco Marchiori,Edson Irion,Klaus Nin,Carlos Schuler Watte,Guilherme Pasqualotto,Alessandro Comarú Severo,Luiz Carlos Hochhegger,Bruno The halo sign: HRCT findings in 85 patients |
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Alves,Giordano Rafael Tronco Marchiori,Edson Irion,Klaus Nin,Carlos Schuler Watte,Guilherme Pasqualotto,Alessandro Comarú Severo,Luiz Carlos Hochhegger,Bruno |
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Alves,Giordano Rafael Tronco |
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The halo sign: HRCT findings in 85 patients |
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The halo sign: HRCT findings in 85 patients |
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The halo sign: HRCT findings in 85 patients |
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The halo sign: HRCT findings in 85 patients |
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The halo sign: HRCT findings in 85 patients |
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halo sign: hrct findings in 85 patients |
description |
ABSTRACT Objective: The halo sign consists of an area of ground-glass opacity surrounding pulmonary lesions on chest CT scans. We compared immunocompetent and immunosuppressed patients in terms of halo sign features and sought to identify those of greatest diagnostic value. Methods: This was a retrospective study of CT scans performed at any of seven centers between January of 2011 and May of 2015. Patients were classified according to their immune status. Two thoracic radiologists reviewed the scans in order to determine the number of lesions, as well as their distribution, size, and contour, together with halo thickness and any other associated findings. Results: Of the 85 patients evaluated, 53 were immunocompetent and 32 were immunosuppressed. Of the 53 immunocompetent patients, 34 (64%) were diagnosed with primary neoplasm. Of the 32 immunosuppressed patients, 25 (78%) were diagnosed with aspergillosis. Multiple and randomly distributed lesions were more common in the immunosuppressed patients than in the immunocompetent patients (p < 0.001 for both). Halo thickness was found to be greater in the immunosuppressed patients (p < 0.05). Conclusions: Etiologies of the halo sign differ markedly between immunocompetent and immunosuppressed patients. Although thicker halos are more likely to occur in patients with infectious diseases, the number and distribution of lesions should also be taken into account when evaluating patients presenting with the halo sign. |
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Sociedade Brasileira de Pneumologia e Tisiologia |
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2016 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132016000600435 |
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