ArticleSurgical and radiologic anatomy : SRA2024
A new anatomical finding: the paramastoid diverticulum of the sigmoid sinus.
Article in Surgical and radiologic anatomy : SRA, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Global prevalence of high jugular bulb and jugular bulb dehiscence: a systematic review and meta-analysis.Anatomical science international · 2026Review
- Mastoid pouch of the sigmoid sinus- an extraordinary anatomical variant.Surgical and radiologic anatomy : SRA · 2025Article
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Authors and funding
3 authors.
Funding
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Abstract
purposeThe sigmoid sinus (SS) is a major surgical landmark. The paramastoid process (PMP) occurs rarely. Inferior diverticula of the SS were not found or reported previously. We aimed to determine the incidence and detailed anatomy of such morphology of the SS.
methodsArchived angioCT files of 25 males and 25 females were used. The morphology of the SS was checked on planar sections and by three-dimensional volume renderings.
resultsIn 3 female cases (6%), inferior paramastoid diverticula of the SS (PMDSSs) were found, two on the right and one on the left. They were all protruding on the inferior side of the jugular process of the occipital bone. Their heights and inner diameters were, respectively, 9.94/11.01 mm, 8.21/4.85 mm and 5.97/8.72 mm. A high jugular bulb was also found on that side in each case. Each PMDSS had a thin or dehiscent bottom. They were closely related to condylar veins, the occipital artery, the vertebral artery and its venous plexus.
conclusionThe PMDSS should not be mistaken as a PMP to avoid surgical lesions of the SS. The PMDSS is an unexpected landmark in the suboccipital region.
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