Diagnostic efficacy of posterior epidural fat interposition on magnetic resonance t1-weighted sequence in the diagnosis of spondylolysis

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dc.authorid0000-0002-5011-815X
dc.authorid0000-0002-7034-7806
dc.contributor.authorGüdü, Burhan Oral
dc.contributor.authorKaran, Belgin
dc.contributor.authorDilbaz, Suna
dc.date.accessioned2025-03-12T12:08:34Z
dc.date.available2025-03-12T12:08:34Z
dc.date.issued2024
dc.departmentİstanbul Medipol Üniversitesi, Tıp Fakültesi, Cerrahi Tıp Bilimleri Bölümü, Beyin ve Sinir Cerrahisi Ana Bilim Dalı
dc.departmentİstanbul Medipol Üniversitesi, Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü, Radyoloji Ana Bilim Dalı
dc.description.abstractObjective: Supportive radiologic signs may be needed to diagnose spondylolysis (SL) via lumbar magnetic resonance imaging (MRI). In SL, the slight displacement of the corpus forward and lamina posteriorly can cause the interposition of posterior epidural fat (EFI), which is normally segmental. This study aimed to determine the diagnostic value of EFI, an indirect sign of SL, on lumbar mid-sagittal T1-weighted MRI. Methods: The lumbar MRI of 115 randomly selected patients with SL and degenerative disc disease (DDD) was randomized and assessed for the presence or absence of EFI by 2 masked observers. These observers were not permitted to examine the pars region. Interobserver agreement was tested using Cohen's kappa coefficient. Results: EFI was positive in 98 (85%) of 115 patients with SL, 14 (12%) in the DDD group, and 6 (5%) with an upper vertebral level adjacent to the SL. The difference was statistically significant (P < 0.01). In patients with SL, the EFI positivity rate was highest at lumbar 5 vertebrae (94%) and lowest at lumbar 3 vertebrae (33%). The specificity, sensitivity, positive predictive value, negative predictive value, and accuracy of EFI in diagnosing SL were mean 64%, 97%, 80%, 97%, and 95%, respectively. The highest diagnostic value of EFI was at the lumbar 5 vertebrae level, where intraobserver and interobserver reliability were nearly perfect. Conclusions: EFI is an indirect radiological finding with high reliability in diagnosing SL with mid-sagittal T1-weighted images in lumbar MRI.
dc.identifier.citationGüdü, B. O., Karan, B. ve Dilbaz, S. (2024). Diagnostic efficacy of posterior epidural fat interposition on magnetic resonance t1-weighted sequence in the diagnosis of spondylolysis. World Neurosurgery, 191, e381-e396. http://dx.doi.org/10.1016/j.wneu.2024.08.134
dc.identifier.doi10.1016/j.wneu.2024.08.134
dc.identifier.endpagee386
dc.identifier.issn1878-8750
dc.identifier.issn1878-8769
dc.identifier.pmid39222840
dc.identifier.scopus2-s2.0-85204737443
dc.identifier.scopusqualityQ2
dc.identifier.startpagee381
dc.identifier.urihttp://dx.doi.org/10.1016/j.wneu.2024.08.134
dc.identifier.urihttps://hdl.handle.net/20.500.12511/12907
dc.identifier.volume191
dc.identifier.wosWOS:001382929600001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorGüdü, Burhan Oral
dc.institutionauthorKaran, Belgin
dc.institutionauthorid0000-0002-5011-815X
dc.institutionauthorid0000-0002-7034-7806
dc.language.isoen
dc.relation.ispartofWorld Neurosurgery
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectEpidural Fat
dc.subjectEpidural Fat Interposition
dc.subjectIsthmic Defect
dc.subjectMagnetic Resonance Imaging
dc.subjectPars Interarticularis
dc.subjectSpine
dc.subjectSpondylolysis
dc.titleDiagnostic efficacy of posterior epidural fat interposition on magnetic resonance t1-weighted sequence in the diagnosis of spondylolysis
dc.typeArticle

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