Classification of meningiomas by location

In some cases, it can affect the plexuses of blood vessels or occur directly in the bones of the skull, affecting the spine along the nerve endings. They are characterized by rather slow growth and can reach significant sizes in some areas of the brain before being detected.

Brain meningioma When a tumor forms close to nerve endings with a plexus of blood vessels, for example, at the base of the skull, the treatment process becomes very complicated.

Risk factors

The pathogenesis brain meningioma Today, statistics say that women over the age of 45 are primarily at risk. Among men and children, the disease is 2 times less common. The risk group also includes people after organ transplantation, those in contact with carcinogenic substances, those infected , those working at nuclear power plants, as well as people who have been exposed to radiation for therapeutic purposes. It is especially worth paying attention to the presence of with cancer . Genetic predisposition is the dominant feature.

Classification of meningiomas by location

Depending on the location, the following types of meningioma :
• Convexital ─ adjacent to the bones of the skull, originating from the outer surface of the brain.
Formed by the temporal, occipital, frontal, parietal bones. This type is the most common, diagnosed in half of the cases of formation. • Parasagittal ─ lies between the meninges of the cerebral hemispheres. In this case, damage to the frontal lobe is possible, leading to deterioration of memory and thinking, and the appearance of seizures; parietal region with impaired pelvic and motor functions up to the appearance of paralysis. In the occipital region, parasagittal meningioma is dangerous due to intracranial pressure and possible hearing loss.
• Greater falciform process ─ over time can grow into the sagittal sinus and lead to impaired venous circulation, provoke a decrease in sensitivity, and epileptic seizures.
• Tentorial ─ is located in the falx - tentorial angle, dangerous due to compression on the occipital lobe.
• Anterior and middle cranial fossa – tubercle sella; olfactory pit.
With this arrangement, visual impairment is characteristic, since it is in this zone that the optic nerves are crossed, vestibular disorders occur, the sense of smell decreases, and hearing deteriorates. • Posterior cranial fossa – large edge of the foramen magnum ─ nystagmus , the facial and oculomotor nerves are affected, visual atrophy is possible.
• Dura mater.
Based on the location of the meningioma and the duration of the disease, the prognosis for recovery is determined solely by the completeness of tumor removal.