Tuesday, 22 November 2016

Brain Tumours

Brain Tumours.     1
There are many different types of brain tumours. They are usually named after the type of brain cells from which they have developed.
Most tumours devlope from the supporting cells of the brain known as the glial. They may be named after the type of cell that are made up of, or after the part of the brain in which they are found, such as a brain stem glioma. More than half of all primary brain tumours are gliomas.

There are four grades, grade 1 tumours are bening and grow very slowly, whereas grade 4 tumours are malignant ( cancerous) and grow faster. Sometimes grade 1 and 2 gliomas are called low grade gliomas and grade 3 and 4 are called high grade gliomas. Knowing the type and grade of your tumours will help your doctor's plan the best treatment.
Types of gliomas
Astrocytic tumours this is a he most common and develops from star shaped cells. They are graded 1_4 is found in adults. Grade three astrocytic gliomas I also known as anaplastic astrocytoma.
Oligodendroglioma they are usually slow growing.
Mixed gliomas mixture of more than one type of cell.
Ependymoma. A rare type of glioma, ependymoma develop from the ependymal cells, which line the ventricles of the brain and the central canal of the spinal cord. These tumours can spread to other parts of the brain and spinal cord.
Medulloblastoma are most common malignant tumours in children.
Central nervous system (CNS) lymphoma is a malignant tumours which is part of the body's immune system
.pineal region tumours
Meningioma they can occur in any part of the meninges over the brain or spinal cord and usually grow very slowly. Acoustic neuroma are usually found only in adults and are more common in people who have genetic condition called neurofibromatosis type 2(NF 2)
Hemangioblastoma.
Pituitary tumours symptoms often occur due to disturbances in vision or hormone levels.
Spinal tumours numbness tingling leg or arm weaknesses and pain in the back, neck and limbs. Sometimes a tumour in the lower part of the spinal cord can lead to loss of control of the bladder or bowel.
Risk factors
Sex male or female more common in males .
Age
Family history
Genetic condition
Radiotherapy treatment

Exposure and occupational history.
To be contd.

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