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Permanent URI for this collectionhttps://hdl.handle.net/11443/932

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Author: search.filters.author.Sanli, Deniz Esin TekcanSubject: search.filters.subject.anosmia

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    Olfactory Cleft Measurements and COVID-19-Related Anosmia
    (SAGE PUBLICATIONS INC, 2021-01-01) Altundag, Aytug; Yildirim, Duzgun; Sanli, Deniz Esin Tekcan; Cayonu, Melih; Kandemirli, Sedat Giray; Sanli, Ahmet Necati; Duz, Ozge Arici; Saatci, Ozlem
    Objective. This study aimed to investigate the differences in olfactory cleft (OC) morphology in coronavirus disease 2019 (COVID-19) anosmia compared to control subjects and postviral anosmia related to infection other than severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Study Design. Prospective. Setting. This study comprises 91 cases, including 24 cases with anosmia due to SARS-CoV-2, 38 patients with olfactory dysfunction (OD) due to viral infection other than SARS-CoV-2, and a control group of 29 normosmic cases. Methods. All cases had paranasal sinus computed tomography (CT), and cases with OD had magnetic resonance imaging (MRI) dedicated to the olfactory nerve. The OC width and volumes were measured on CT, and T2-weighted signal intensity (SI), olfactory bulb volumes, and olfactory sulcus depths were assessed on MRI. Results. This study showed 3 major findings: the right and left OC widths were significantly wider in anosmic patients due to SARS-CoV-2 (group 1) or OD due to non-SARS-CoV-2 viral infection (group 2) when compared to healthy controls. OC volumes were significantly higher in group 1 or 2 than in healthy controls, and T2 SI of OC area was higher in groups 1 and 2 than in healthy controls. There was no significant difference in olfactory bulb volumes and olfactory sulcus depths on MRI among groups 1 and 2. Conclusion. In this study, patients with COVID-19 anosmia had higher OC widths and volumes compared to control subjects. In addition, there was higher T2 SI of the olfactory bulb in COVID-19 anosmia compared to control subjects, suggesting underlying inflammatory changes. There was a significant negative correlation between these morphological findings and threshold discrimination identification scores.
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    A Comparative Olfactory MRI, DTI and fMRI Study of COVID-19 Related Anosmia and Post Viral Olfactory Dysfunction
    (ELSEVIER SCIENCE INC, 2022-01-01) Yildirim, Duzgun; Kandemirli, Sedat Giray; Sanli, Deniz Esin Tekcan; Akinci, Ozlem; Altundag, Aytug
    Rationale and Objective: To evaluate how COVID-19 anosmia imaging findings resembled and differed from postinfectious olfactory Material and Methods: A total of 31 patients presenting with persistent COVID-19 related OD and 97 patients with post-infectious OD were included. Olfactory bulb MRI, DTI and olfactory fMRI findings in both groups were retrospectively assessed. Results: All COVID-19 related OD cases were anosmic, 18.6\% of post-infectious OD patients were hyposmic and remaining 81.4\% were anosmic. Mean interval between onset of OD and imaging was 1.5 months for COVID-19 related OD and 6 months for post-infectious OD. Olfactory bulb volumes were significantly higher in COVID-19 related OD than post-infectious OD. Deformed bulb morphology and increased olfactory bulb signal intensity was seen in 58.1\% and 51.6\% with COVID-19 related OD