The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas
PURPOSE:The reliability and reproducibility of T2-weighted imaging/ fluid-attenuated inversion recovery (T2/FLAIR) mismatch were investigated in the diagnosis of isocitrate dehydrogenase (IDH) mutant astrocytoma between WHO grade II and III diffuse hemispheric gliomas.METHODS:WHO grade II and grade...
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| Format: | Article |
| Language: | English |
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Galenos Publishing House
2021-11-01
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| Series: | Diagnostic and Interventional Radiology |
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http://www.dirjournal.org/archives/archive-detail/article-preview/the-reliability-and-interobserver-reproducibility-/53828
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| _version_ | 1797691395416260608 |
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| author | İbrahim Önder Yeniçeri Mehmet Erdem Yıldız Koray Özduman Ayça Erşen Danyeli M. Necmettin Pamir Alp Dinçer |
| author_facet | İbrahim Önder Yeniçeri Mehmet Erdem Yıldız Koray Özduman Ayça Erşen Danyeli M. Necmettin Pamir Alp Dinçer |
| author_sort | İbrahim Önder Yeniçeri |
| collection | DOAJ |
| description | PURPOSE:The reliability and reproducibility of T2-weighted imaging/ fluid-attenuated inversion recovery (T2/FLAIR) mismatch were investigated in the diagnosis of isocitrate dehydrogenase (IDH) mutant astrocytoma between WHO grade II and III diffuse hemispheric gliomas.METHODS:WHO grade II and grade III diffuse hemispheric gliomas (n=133) treated in our institute were included in the study. Pathological findings and molecular markers of the cases were reviewed with the criteria of WHO 2016. The finding of mismatch between T2-weighted and FLAIR images in preoperative magnetic resonance imaging (MRI) of the cases was evaluated by two different radiologists. The readers reviewed MRIs independently, blinded to the histopathologic diagnosis or molecular subset of tumors. The cases were classified as IDH-mutant astrocytoma, oligodendroglioma and IDH-wildtype (IDH-wt) astrocytoma according to molecular and genetic features.RESULTS:T2/FLAIR mismatch positivity was observed in 46 patients (34.6%). T2/FLAIR mismatch positivity was observed in 42 of 75 IDH-mutant astrocytomas (56%) and 4 of 43 oligodendrogliomas (9.30%), while it was not seen among IDH-wt astrocytomas (0/15, 0%). The T2/FLAIR mismatch ratio was significantly different between IDH-mutant astrocytomas (WHO grade II and grade III) and oligodendrogliomas (chi-square, p <0.05). The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of T2/FLAIR mismatch in predicting IDH-mutant astrocytomas were 58.7%, 90.7%, 91.7%, 61.4%, and 70.3% respectively. Radiologist 1 diagnosed T2/FLAIR mismatch in 48 of 133 cases (36.1%) and Radiologist 2 in 66 of 133 cases (49.6%). The interrater agreement for the T2/FLAIR mismatch sign was 0.61 (p <0.05), 95% CI (0.55, 0.67).CONCLUSION:T2/FLAIR mismatch appears to be an important MRI finding in distinguishing IDH-mutant astrocytomas from other diffuse hemispheric gliomas. However, it should be kept in mind that T2/FLAIR mismatch sign can be seen in a minority of oligodendrogliomas besides IDH-mutant astrocytomas. |
| first_indexed | 2024-03-12T02:12:42Z |
| format | Article |
| id | doaj.art-f2149ec28345448ba18e8801d73d9616 |
| institution | Directory Open Access Journal |
| issn | 1305-3825 1305-3612 |
| language | English |
| last_indexed | 2024-03-12T02:12:42Z |
| publishDate | 2021-11-01 |
| publisher | Galenos Publishing House |
| record_format | Article |
| series | Diagnostic and Interventional Radiology |
| spelling | doaj.art-f2149ec28345448ba18e8801d73d96162023-09-06T12:17:14ZengGalenos Publishing HouseDiagnostic and Interventional Radiology1305-38251305-36122021-11-0127679680110.5152/dir.2021.2062413049054The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomasİbrahim Önder Yeniçeri0Mehmet Erdem Yıldız1Koray Özduman2Ayça Erşen Danyeli3M. Necmettin Pamir4Alp Dinçer5 Department of Radiology, Muğla Sıtkı Koçman University School of Medicine, Muğla, Turkey Department of Radiology Acıbadem University School of Medicine, İstanbul, Turkey Department of Neurosurgery, Acıbadem Mehmet Ali Aydınlar University School of Medicine, İstanbul, Turkey Department of Pathology, Acıbadem Mehmet Ali Aydınlar University School of Medicine, Acıbadem Altunizade Hospital, İstanbul, Turkey Departments of Neurosurgery Acıbadem University School of Medicine, İstanbul, Turkey Department of Radiology, Acıbadem Mehmet Ali Aydınlar University School of Medicine, İstanbul, Turkey PURPOSE:The reliability and reproducibility of T2-weighted imaging/ fluid-attenuated inversion recovery (T2/FLAIR) mismatch were investigated in the diagnosis of isocitrate dehydrogenase (IDH) mutant astrocytoma between WHO grade II and III diffuse hemispheric gliomas.METHODS:WHO grade II and grade III diffuse hemispheric gliomas (n=133) treated in our institute were included in the study. Pathological findings and molecular markers of the cases were reviewed with the criteria of WHO 2016. The finding of mismatch between T2-weighted and FLAIR images in preoperative magnetic resonance imaging (MRI) of the cases was evaluated by two different radiologists. The readers reviewed MRIs independently, blinded to the histopathologic diagnosis or molecular subset of tumors. The cases were classified as IDH-mutant astrocytoma, oligodendroglioma and IDH-wildtype (IDH-wt) astrocytoma according to molecular and genetic features.RESULTS:T2/FLAIR mismatch positivity was observed in 46 patients (34.6%). T2/FLAIR mismatch positivity was observed in 42 of 75 IDH-mutant astrocytomas (56%) and 4 of 43 oligodendrogliomas (9.30%), while it was not seen among IDH-wt astrocytomas (0/15, 0%). The T2/FLAIR mismatch ratio was significantly different between IDH-mutant astrocytomas (WHO grade II and grade III) and oligodendrogliomas (chi-square, p <0.05). The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of T2/FLAIR mismatch in predicting IDH-mutant astrocytomas were 58.7%, 90.7%, 91.7%, 61.4%, and 70.3% respectively. Radiologist 1 diagnosed T2/FLAIR mismatch in 48 of 133 cases (36.1%) and Radiologist 2 in 66 of 133 cases (49.6%). The interrater agreement for the T2/FLAIR mismatch sign was 0.61 (p <0.05), 95% CI (0.55, 0.67).CONCLUSION:T2/FLAIR mismatch appears to be an important MRI finding in distinguishing IDH-mutant astrocytomas from other diffuse hemispheric gliomas. However, it should be kept in mind that T2/FLAIR mismatch sign can be seen in a minority of oligodendrogliomas besides IDH-mutant astrocytomas. http://www.dirjournal.org/archives/archive-detail/article-preview/the-reliability-and-interobserver-reproducibility-/53828 |
| spellingShingle | İbrahim Önder Yeniçeri Mehmet Erdem Yıldız Koray Özduman Ayça Erşen Danyeli M. Necmettin Pamir Alp Dinçer The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas Diagnostic and Interventional Radiology |
| title | The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas |
| title_full | The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas |
| title_fullStr | The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas |
| title_full_unstemmed | The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas |
| title_short | The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas |
| title_sort | reliability and interobserver reproducibility of t2 flair mismatch in the diagnosis of idh mutant astrocytomas |
| url |
http://www.dirjournal.org/archives/archive-detail/article-preview/the-reliability-and-interobserver-reproducibility-/53828
|
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