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dc.contributor.authorYeniçari, İbrahim Önder
dc.contributor.authorYıldız, Mehmet Erdem
dc.contributor.authorÖzduman, Koray
dc.contributor.authorDanyeli, Ayşe Ercan
dc.contributor.authorPamir, Necmettin
dc.contributor.authorDinçer, Alp
dc.date.accessioned2021-11-24T07:32:53Z
dc.date.available2021-11-24T07:32:53Z
dc.date.issued2021en_US
dc.identifier.citationYeniçeri İÖ, Yılmaz ME, Erşen-Danyeli A, Özduman K, Pamir MN, Dinçer A. The reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomas. Diagn Interv Radiol 2021; 27:796–801.en_US
dc.identifier.issn1305-3612
dc.identifier.urihttps://hdl.handle.net/20.500.12809/9656
dc.description.abstractPurpose: 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.en_US
dc.language.isoengen_US
dc.publisherAves Yayıncılıken_US
dc.relation.isversionof10.5152/dir.2021.20624en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectT2-weighted imaging/ fluid-attenuated inversionen_US
dc.titleThe reliability and interobserver reproducibility of T2/FLAIR mismatch in the diagnosis of IDH-mutant astrocytomasen_US
dc.typearticleen_US
dc.contributor.departmentMÜ, Tıp Fakültesi, Dahili Tıp Bilimleri Bölümüen_US
dc.contributor.authorID0000-0003-2779-2020en_US
dc.contributor.institutionauthorYeniçari, İbrahim Önder
dc.identifier.volume27en_US
dc.identifier.issue6en_US
dc.identifier.startpage796en_US
dc.identifier.endpage801en_US
dc.relation.journalDiagnostic and Interventional Radiologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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