ahmedsaro

ahmed Salah Eldin saro

Assistant Professor - Assistant Professor of neurosurgery - Sohag faculty of medicine

Faculty of medicine

Address: Neurosurgery department- sohag faculty of medicine- Naser city - Sohag

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Meningiomas

2018-10-25 17:30:53 |

A meningioma is a tumour that grows out of the meninges, particularly the one known as the arachnoid layer (so called because it looks like a web). A meningioma is usually benign, although a small percentage are malignant (cancerous). 

The tumour typically grows slowly and doesn’t spread to any other part of the body. Close to one in five brain tumours are meningiomas. Women and older people are more likely to develop this type of tumour, for reasons unknown. Symptoms depend on the size and location of the meningioma, but may include headaches and seizures.

The primary form of treatment is surgery to remove the tumour completely. In rare cases, this isn’t always possible because the meningioma is inaccessible, or parts may have invaded important blood vessels or nerves.

Symptoms of meningioma


The symptoms of meningioma depend on the location, type and size but may include:

  • Seizures (fits)
  • Headaches
  • Impairment of brain functioning, depending on the location of the tumour.

Symptoms depend on location


Meningiomas are classified according to their appearance. For example, they may be cellular or fibrous or contain plenty of blood vessels. Another classification method is by location. Associated symptoms for a selection of meningioma locations may include:

  • Between the brain lobes (parasagittal) - paralysis of usually one leg.
  • Underneath the brain and behind the nose (olfactory groove) - loss of the sense of smell (anosmia).
  • Underneath the brain and behind the eye (sphenoid wing) - seizures and multiple cranial nerve palsies.
  • Rear of the brain (occipital lobe) - loss of half of the field of vision in one eye (contralateral hemianopsia).
  • Spinal cord - pain in the spine, weakness and decreased ability to ‘sense’ the body’s location.

How meningiomas cause symptoms


The symptoms of a meningioma can be triggered by various means including:

  • Compression - the tumour may be large enough to squash the underlying brain tissue. Headaches are a common symptom.
  • Irritation - the nerves of the brain may be irritated and disrupted by the tumour’s presence, particularly if the tumour is located over the cortex (uppermost layer of the brain). Seizures are a common symptom of cortex irritation.
  • Invasion - the tumour may invade brain tissue. Symptoms depend on which parts of the brain are affected.
  • Injuries to blood vessels - the tumour may disrupt blood flow to various parts of the brain by injuring or blocking the blood vessels.
 

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Meningiomas

2018-10-26 11:48:39 Meningiomas
A meningioma is a tumor that grows from the meninges — the protective membranes that cover the brain and spinal cord. Most meningiomas are benign (not cancer) and slow Read more