{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T14:45:19Z","timestamp":1773931519828,"version":"3.50.1"},"reference-count":24,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T00:00:00Z","timestamp":1773878400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Objective: This study aimed to determine the relationship between sigmoid sinus dehiscence (SSD), sigmoid sinus topography, mastoid pneumatization, and adjacent temporal bone structures in patients with pulsatile tinnitus (PT). Methods: A retrospective analysis was performed on 344 temporal bone cone-beam computed tomography (CBCT) scans (172 PT patients and 172 age- and sex-matched controls). The degree of mastoid pneumatization, presence and size of SSD, sinus topography, and distances between the sigmoid sinus and key landmarks\u2014the lateral semicircular canal (LSCC), jugular bulb (HJB), and external auditory canal (EAC)\u2014were measured. Quantitative and qualitative characteristics were compared between groups, and independent predictors of PT were identified using multivariate logistic regression. Results: Compared to controls, SSD was substantially more common in the PT group (115\/172 vs. 44\/172, p &lt; 0.001). Patients with PT had significantly larger anteroposterior and vertical sigmoid sinus dehiscence diameters (4.61 \u00b1 0.99 mm vs. 3.87 \u00b1 0.25 mm and 3.37 \u00b1 0.47 mm vs. 2.92 \u00b1 0.14 mm, respectively; both p &lt; 0.01). Additionally, in the PT group, the sigmoid sinus was situated closer to the lateral semicircular canal, jugular bulb (JB), and external auditory canal (all p &lt; 0.01). Conclusions: Venous pulsatile tinnitus was substantially correlated with sigmoid sinus dehiscence, sinus topography, and decreased sinus\u2013EAC distance. Quantitative CBCT evaluation of these anatomical relationships could help with surgical planning and enhance diagnostic evaluation.<\/jats:p>","DOI":"10.3390\/diagnostics16060914","type":"journal-article","created":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T11:50:36Z","timestamp":1773921036000},"page":"914","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Possible Relationship Between Sigmoid Dehiscence, Degree of Mastoid Pneumatization, and Sigmoid Sinus Position in Patients with Pulsatile Tinnitus"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7097-1572","authenticated-orcid":false,"given":"Burak","family":"Bileceno\u011flu","sequence":"first","affiliation":[{"name":"Department of Anatomy, Faculty of Medicine, Ankara Medipol University, Eti, Celal Bayar Blv. No:88\/1, Ankara 06570, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6745-4814","authenticated-orcid":false,"given":"Tu\u011f\u00e7e","family":"Ak\u0131n","sequence":"additional","affiliation":[{"name":"Department of Anatomy, Faculty of Medicine, Ankara Medipol University, Eti, Celal Bayar Blv. No:88\/1, Ankara 06570, Turkey"},{"name":"Department of Clinical Anatomy, Institute of Health Sciences, Istanbul Medipol University, Istanbul 34820, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Berin Tu\u011fta\u011f","family":"Demir","sequence":"additional","affiliation":[{"name":"Department of Anatomy, Faculty of Medicine, Ankara Medipol University, Eti, Celal Bayar Blv. No:88\/1, Ankara 06570, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00d6mer","family":"Korkmazy\u00fcrek","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology, Derik State Hospital, Kale Mahallesi, Diyarbak\u0131r Blv. No:70, Mardin 47800, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ali","family":"K\u00f6ksal","sequence":"additional","affiliation":[{"name":"Department of Radiology, Bay\u0131nd\u0131r Hospital S\u00f6\u011f\u00fct\u00f6z\u00fc, K\u0131z\u0131l\u0131rmak Mahallesi, S\u00f6\u011f\u00fct\u00f6z\u00fc, 1443. Cd. No:17, Ankara 06250, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6768-0176","authenticated-orcid":false,"given":"Kaan","family":"Orhan","sequence":"additional","affiliation":[{"name":"Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Emniyet, Mevlana Blv. No:19\/1, Ankara 06560, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"883","DOI":"10.1016\/j.crad.2016.06.106","article-title":"Association between the Extent of Sigmoid Sinus Dehiscence and an Occurrence of Pulsatile Tinnitus: A Retrospective Imaging Study","volume":"71","author":"Dong","year":"2016","journal-title":"Clin. Radiol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"319","DOI":"10.5152\/iao.2021.9449","article-title":"The Effect of Degree of Temporal Bone Pneumatization on Sound Transmission of Pulsatile Tinnitus Induced by Sigmoid Sinus Diverticulum and\/or Dehiscence: A Clinical and Experimental Study","volume":"17","author":"Liu","year":"2021","journal-title":"J. Int. Adv. 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