Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen

Detalhes bibliográficos
Autor(a) principal: Martins,Victor Guerra
Data de Publicação: 2022
Outros Autores: Torres,Cecilia Vidal S, Mermejo,Livia Mara, Tucci Jr.,Silvio, Molina,Carlos Augusto Fernandes, Elias Jr.,Jorge, Muglia,Valdair Francisco
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Radiologia Brasileira (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842022000300145
Resumo: Abstract Objective: To estimate the frequency of lipid-poor adenomas (LPAs) in magnetic resonance imaging (MRI) examinations. Materials and Methods: We retrospectively investigated adrenal lesions on MRI examinations performed in a total of 2,014 patients between January 2016 and December 2017. After exclusions, the sample comprised 69 patients with 74 proven adenomas. Two readers (reader 1 and reader 2) evaluated lesion size, laterality, homogeneity, signal drop on out-of-phase (OP) images, and the signal intensity index (SII). An LPA was defined as a lesion with no signal drop on OP images and an SII < 16.5%. For 68 lesions, computed tomography (CT) scans (obtained within one year of the MRI) were also reviewed. Results: Of the 69 patients evaluated, 42 (60.8%) were women and 27 (39.2%) were men. The mean age was 59.2 ± 14.1 years. Among the 74 confirmed adrenal adenomas evaluated, the mean lesion size was 18.5 ± 7.7 mm (range, 7.0-56.0 mm) for reader 1 and 21.0 ± 8.3 mm (range, 7.0-55.0 mm) for reader 2 (p = 0.055). On the basis of the signal drop in OP MRI sequences, both readers identified five (6.8%) of the 74 lesions as being LPAs. When determined on the basis of the SII, that frequency was three (4.0%) for reader 1 and four (5.4%) for reader 2. On CT, 21 (30.8%) of the 68 lesions evaluated were classified as LPAs. Conclusion: The prevalence of LPA was significantly lower on MRI than on CT. That prevalence tends to be even lower when the definition of LPA relies on a quantitative analysis rather than on a qualitative (visual) analysis.
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spelling Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomenAdenoma/diagnostic imagingAdrenal gland neoplasms/diagnostic imagingIncidental findingsMagnetic resonance imagingTomography, X-ray computedAbstract Objective: To estimate the frequency of lipid-poor adenomas (LPAs) in magnetic resonance imaging (MRI) examinations. Materials and Methods: We retrospectively investigated adrenal lesions on MRI examinations performed in a total of 2,014 patients between January 2016 and December 2017. After exclusions, the sample comprised 69 patients with 74 proven adenomas. Two readers (reader 1 and reader 2) evaluated lesion size, laterality, homogeneity, signal drop on out-of-phase (OP) images, and the signal intensity index (SII). An LPA was defined as a lesion with no signal drop on OP images and an SII < 16.5%. For 68 lesions, computed tomography (CT) scans (obtained within one year of the MRI) were also reviewed. Results: Of the 69 patients evaluated, 42 (60.8%) were women and 27 (39.2%) were men. The mean age was 59.2 ± 14.1 years. Among the 74 confirmed adrenal adenomas evaluated, the mean lesion size was 18.5 ± 7.7 mm (range, 7.0-56.0 mm) for reader 1 and 21.0 ± 8.3 mm (range, 7.0-55.0 mm) for reader 2 (p = 0.055). On the basis of the signal drop in OP MRI sequences, both readers identified five (6.8%) of the 74 lesions as being LPAs. When determined on the basis of the SII, that frequency was three (4.0%) for reader 1 and four (5.4%) for reader 2. On CT, 21 (30.8%) of the 68 lesions evaluated were classified as LPAs. Conclusion: The prevalence of LPA was significantly lower on MRI than on CT. That prevalence tends to be even lower when the definition of LPA relies on a quantitative analysis rather than on a qualitative (visual) analysis.Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem2022-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842022000300145Radiologia Brasileira v.55 n.3 2022reponame:Radiologia Brasileira (Online)instname:Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)instacron:CBR10.1590/0100-3984.2021.0083info:eu-repo/semantics/openAccessMartins,Victor GuerraTorres,Cecilia Vidal SMermejo,Livia MaraTucci Jr.,SilvioMolina,Carlos Augusto FernandesElias Jr.,JorgeMuglia,Valdair Franciscoeng2022-06-20T00:00:00Zoai:scielo:S0100-39842022000300145Revistahttps://www.scielo.br/j/rb/https://old.scielo.br/oai/scielo-oai.phpradiologiabrasileira@cbr.org.br1678-70990100-3984opendoar:2022-06-20T00:00Radiologia Brasileira (Online) - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)false
dc.title.none.fl_str_mv Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
title Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
spellingShingle Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
Martins,Victor Guerra
Adenoma/diagnostic imaging
Adrenal gland neoplasms/diagnostic imaging
Incidental findings
Magnetic resonance imaging
Tomography, X-ray computed
title_short Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
title_full Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
title_fullStr Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
title_full_unstemmed Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
title_sort Frequency of lipid-poor adrenal adenomas in magnetic resonance imaging examinations of the abdomen
author Martins,Victor Guerra
author_facet Martins,Victor Guerra
Torres,Cecilia Vidal S
Mermejo,Livia Mara
Tucci Jr.,Silvio
Molina,Carlos Augusto Fernandes
Elias Jr.,Jorge
Muglia,Valdair Francisco
author_role author
author2 Torres,Cecilia Vidal S
Mermejo,Livia Mara
Tucci Jr.,Silvio
Molina,Carlos Augusto Fernandes
Elias Jr.,Jorge
Muglia,Valdair Francisco
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Martins,Victor Guerra
Torres,Cecilia Vidal S
Mermejo,Livia Mara
Tucci Jr.,Silvio
Molina,Carlos Augusto Fernandes
Elias Jr.,Jorge
Muglia,Valdair Francisco
dc.subject.por.fl_str_mv Adenoma/diagnostic imaging
Adrenal gland neoplasms/diagnostic imaging
Incidental findings
Magnetic resonance imaging
Tomography, X-ray computed
topic Adenoma/diagnostic imaging
Adrenal gland neoplasms/diagnostic imaging
Incidental findings
Magnetic resonance imaging
Tomography, X-ray computed
description Abstract Objective: To estimate the frequency of lipid-poor adenomas (LPAs) in magnetic resonance imaging (MRI) examinations. Materials and Methods: We retrospectively investigated adrenal lesions on MRI examinations performed in a total of 2,014 patients between January 2016 and December 2017. After exclusions, the sample comprised 69 patients with 74 proven adenomas. Two readers (reader 1 and reader 2) evaluated lesion size, laterality, homogeneity, signal drop on out-of-phase (OP) images, and the signal intensity index (SII). An LPA was defined as a lesion with no signal drop on OP images and an SII < 16.5%. For 68 lesions, computed tomography (CT) scans (obtained within one year of the MRI) were also reviewed. Results: Of the 69 patients evaluated, 42 (60.8%) were women and 27 (39.2%) were men. The mean age was 59.2 ± 14.1 years. Among the 74 confirmed adrenal adenomas evaluated, the mean lesion size was 18.5 ± 7.7 mm (range, 7.0-56.0 mm) for reader 1 and 21.0 ± 8.3 mm (range, 7.0-55.0 mm) for reader 2 (p = 0.055). On the basis of the signal drop in OP MRI sequences, both readers identified five (6.8%) of the 74 lesions as being LPAs. When determined on the basis of the SII, that frequency was three (4.0%) for reader 1 and four (5.4%) for reader 2. On CT, 21 (30.8%) of the 68 lesions evaluated were classified as LPAs. Conclusion: The prevalence of LPA was significantly lower on MRI than on CT. That prevalence tends to be even lower when the definition of LPA relies on a quantitative analysis rather than on a qualitative (visual) analysis.
publishDate 2022
dc.date.none.fl_str_mv 2022-05-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842022000300145
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842022000300145
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0100-3984.2021.0083
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem
publisher.none.fl_str_mv Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem
dc.source.none.fl_str_mv Radiologia Brasileira v.55 n.3 2022
reponame:Radiologia Brasileira (Online)
instname:Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)
instacron:CBR
instname_str Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)
instacron_str CBR
institution CBR
reponame_str Radiologia Brasileira (Online)
collection Radiologia Brasileira (Online)
repository.name.fl_str_mv Radiologia Brasileira (Online) - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)
repository.mail.fl_str_mv radiologiabrasileira@cbr.org.br
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