MRI findings of meningioma in various locations: a pictorial review

Abstract

  Meningioma, one of the most common brain tumor accounts for about one-third of all primary intracranial neoplasms⁽¹⁾.

 It can occur virtually at any site within central nervous system⁽²⁾. However, 90% of meningiomas occur in supratentorial location, most common location being parasagittal/ convexity. Around 15-20% occur along sphenoid ridge. Other common supratentorial locations are- sellar/ parasellar region, olfactory groove. Less common sites in supratentorial region are- ventricles, pineal region. Posterior fossa meningiomas account for around 8-10%. Cerebellopontine angle is the most common infratentorial site. Extradural spaces can also be affected, sites being the optic nerve sheath, paranasal sinuses and nose.

 Most meningiomas are asymptomatic and diagnosed incidentally⁽²⁾. Usually middle aged and older people are affected. Females are affected more frequently than the males⁽³⁾.