Clinical Presentation & Radiographic Appearance (by location)
Meningioma may cause varying symptoms, mainly dictated by (1) the tumor location and (2) the extent of the “mass effect” or pressure exerted on the surrounding anatomic structures by the tumor itself and/or the “edema” (i.e. brain swelling) caused by the tumor when present. Small tumors, in the absence of any severe surrounding edema, usually do not cause any significant symptoms because of the negligible “mass effect”. Sometimes, even large tumors may not cause any significant symptoms mainly because the tumor grew slowly and the surrounding brain accommodated well the gradually progressing mass effect.
Symptoms (“clinical presentation”) caused by meningiomas are direct reflection on the particular function of the brain/cranial nerve(s) affected by the tumor’s mass effect:
Any forebrain areas (i.e. the frontal, temporal, parietal and occipital lobes) – Seizures and headache when large
Frontal lobe – Personality changes
Left temporal lobe – Memory and/or speech problems
Frontoparietal lobe – Focal seziures, focal weakness/numbness on the opposite side
Optic nerve (CN II) – Visual deterioration
Occipital lobe – Visual field deficit
Cerebellum (the “hind brain”) – Balance and coordination problems, walking difficulty
Other cranial nerves – Loss of smell (CN I), facial pain/numbness (CN V), double vision (CN III, IV, VI), hearing loss (CN VIII), swallowing difficulty and/or hoarseness (CN X)
The following images are selected, and not comprehensive, examples of meningiomas. Common symptoms caused by these meningiomas according to their locations are presented.
Clinical Presentation & Radiographic Appearance