====== Meningiomas ======

//Meningiomas //are a category of primary brain tumour. They are slow growing, and often symptom-free. They form in the //meninges// - the thin layer of tissues which surround the brain - rather than in the brain itself.

It's estimated that roughly one in a thousand people is affected at some stage in their lives, making meningiomas one of the most common types of brain tumour.

The cause is unknown - although it's been discovered that ionising radiation (x-rays etc) can be a trigger in genetically-prone individuals.

The  growth rate appears to be affected by the levels of some  hormones, e.g. progesterone. There may also be a link with obesity.

Further reading : [[https://www.abta.org/wp-content/uploads/2020/06/Meningioma-Brochure_2020_web_en.pdf|American Brain Tumor Association]]

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Also see [[content:medicine:diseases:g-l:glioblastoma]]