Unilateral Tentorial Hypoplasia with Ipsilateral Brain Herniation

Premi, Vimugdha

doi:10.18535/jmscr/v8i1.55

jmscr

2020

DOI: 10.18535/jmscr/v8i1.55

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Unilateral Tentorial Hypoplasia with Ipsilateral Brain Herniation

Vimugdha Premi¹

Abstract: A case of unilateral tentorial hypoplasia with ipsilateral brain herniation is presented. This was an incidental finding in a 38 years old lady without any other associated findings. Computed Tomographic and Magnetic Resonance showed mild dilation of occipital horn of left lateral ventricle, which is a rare finding.

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2022

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Cited by 2 publications

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The prevalence of isolated tentorial hypoplasia on magnetic resonance imaging

Ünal¹,

Şara²

2022

Pol J Radiol

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Purpose:The tent shape of the tentorium cerebelli helps preserve brain anatomy by providing cerebellum protection against pressure caused by the brain's gravity effect. In the absence of this support structure of the tentorium, herniation occurs in the brain. Isolated tentorial hypoplasia (TH) is extremely rare. In this study, we aimed to calculate the prevalence of this entity, which is reported to be rare in the literature.Material and methods: Magnetic resonance imaging (MRI) images of 5163 patients who applied to the training and research hospital for various reasons between 1 September 2020, and 31 August 2021, who underwent brain MRI, were reviewed retrospectively. Results:The prevalence of TH among patients screened during a period of one year was calculated as 2.22%. Of these, 76.59% were female (n = 72) and 23.41% were male (n = 22). The rates of presentation of complaints among TH patients were 60.63% headache, 17.02% vertigo, 4.25% seizures, 3.19% tremor, 3.19% syncope, 7.44% forgetfulness, and 2.12% visual impairment. Five patients (11.76%) were admitted for metastasis investigation due to their primary malignancy; they did not have any complaints. Localization of TH: 18.08% (n = 17) were observed on the right side, 28.72% (n = 27) on the left side, and 53.19% (n = 50) on the bilateral tentorium leaf. Conclusions:Being aware of TH during brain MRI evaluation will help prevent possible misdiagnoses. We hope that this study with a large number of patients will increase awareness about TH, because there are no studies other than cadaver studies and a few case reports.

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The prevalence of isolated tentorial hypoplasia on magnetic resonance imaging

Ünal¹,

Şara²

2022

Pol J Radiol

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Bilateral Occipital Lobe Herniations Due to Asymmetric Tentorial Defects: Incidental Computed Tomography (CT) Findings & Literature Review

Shoyab¹

2022

Cureus

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Congenital defects in the tentorium cerebelli are quite rare occurrences and are often too small and asymptomatic. This is a case report of a female patient aged 11 years, complaining of headache, vertigo, and vomiting. Her computed tomography (CT) images show transtentorial herniation of occipital gyri across a developmental defect involving the anterior free margin of the tentorium cerebelli. Similar cases have been reported in the past as "incidental" and "potentially symptomatic" findings, and in at least one case as a proven pathological findings. Our case is unique in terms of the asymmetric bilateral configuration and comparatively larger size of the defect. We have included a review of the existing medical literature in order to derive learning points for the betterment of our understanding of a rare entity that can have significant implications.

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Unilateral Tentorial Hypoplasia with Ipsilateral Brain Herniation

Cited by 2 publications

References 8 publications

The prevalence of isolated tentorial hypoplasia on magnetic resonance imaging

The prevalence of isolated tentorial hypoplasia on magnetic resonance imaging

Bilateral Occipital Lobe Herniations Due to Asymmetric Tentorial Defects: Incidental Computed Tomography (CT) Findings & Literature Review

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