Intraventricular meningioma epidemiology [Neurosurgery Wiki]

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====== Intraventricular meningioma epidemiology ======

{{rss>https://pubmed.ncbi.nlm.nih.gov/rss/search/1rE397IRBYUS-rgMyQx3ocaOM0ilmJKAeH9C36_7vAl-dB5AqB/?limit=15&utm_campaign=pubmed-2&fc=20221219054959}}
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Primary [[intraventricular meningioma]]s (IVM) are rare, corresponding to 0.5 to 5% of all intracranial meningiomas.

Intraventricular meningiomas are most often seen in the [[lateral ventricle]]s of adults, more often on the left than on the right
((McDermott MW. Intraventricular meningiomas. Neurosurg Clin N Am. 2003 Oct;14(4):559-69. doi: 10.1016/s1042-3680(03)00055-x. PMID: 15024801.))

[[Pediatric intraventricular meningioma]] tend to have a [[male]] preponderance in contrast to [[adult]]s who have a preference for [[female]]s
((Dash C, Pasricha R, Gurjar H, Singh PK, Sharma BS. Pediatric intraventricular meningioma: A series of six cases. J Pediatr Neurosci. 2016 Jul-Sep;11(3):193-196. doi: 10.4103/1817-1745.193356. PMID: 27857785; PMCID: PMC5108119.)).
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Some studies have reported that they are more common on the left side
((Criscuolo GR, Symon L. Intraventricular meningioma. A review of 10 cases of the National Hospital, Queen Square (1974-1985) with reference to the literature. Acta Neurochir (Wien). 1986;83(3-4):83-91. doi: 10.1007/BF01402383. PMID: 3492867.))
((Fornari M, Savoiardo M, Morello G, Solero CL. Meningiomas of the lateral ventricles. Neuroradiological and surgical considerations in 18 cases. J Neurosurg. 1981 Jan;54(1):64-74. doi: 10.3171/jns.1981.54.1.0064. PMID: 7463122.)).

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A [[Medline]] search up to March 2018 using "[[intraventricular meningioma]]" returned 98 [[paper]]s. As a first selection step, we adopted the following inclusion criteria: series and [[case report]]s about IVMs, as well as papers written in other languages, but [[abstract]]s written in English were evaluated. Six hundred eighty-one tumors were evaluated from 98 papers. The majority of the tumors were located in the [[lateral ventricle]]s (602-88.4%), [[fourth ventricle]] (59-8.7%), and [[third ventricle]] (20-2.9%)


The most common location is the [[trigone]] ([[atrium]]) of the lateral ventricle. Due to the fluid cavity location and their slow growth they can become large tumors before proper diagnosis.

Intraventricular meningiomas typically present between 30 and 60 years of age. The mean age at diagnosis is 42.2 +/- 8.2 years old.

Approximately 90% of them are WHO grade I

They have a female predilection with 1.47 female/1.0 male ratio, lower than dural-based extra-axial meningiomas
((Pereira BJA, de Almeida AN, Paiva WS, de Aguiar PHP, Teixeira MJ, Marie SKN. Natural history of intraventricular meningiomas: systematic review. Neurosurg Rev. 2020 Apr;43(2):513-523. doi: 10.1007/s10143-018-1019-0. Epub 2018 Aug 15. PMID: 30112665.)).