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Currently, we are unaware of any direct causes that explain the appearance of brain tumours. Some tumours may be hereditary (neurofibromas) or induced by physical agents (radiotherapy). The vast majority of brain tumours are considered to have a multifactorial origin.
Symptoms of Brain Tumour
Increased intracranial pressure. As the tumour grows it occupies more space within the skull, thus increasing the intracranial pressure and causing symptoms such as headaches, sleepiness, nausea, vomiting and in very severe cases a loss of consciousness and a comatose state.
Direct local lesion. Depending on its location, the tumour may result in a loss of strength or sensitivity, language impairment, visual disturbances, memory problems, etc. These symptoms often tend to remain as sequelae of any surgical treatment.
Cerebrospinal fluid circulation obstruction. A clear liquid, known as cerebrospinal fluid (CSF), is produced inside the brain. It circulates from the centre of the brain, through some canals, and towards the brain’s surface where it is reabsorbed. The brain generates approximately 500 mL of CSF every day; it also absorbs the same daily volume. A tumour can obstruct the normal circulation of CSF and stop it from reaching the reabsorption site. This situation is known as hydrocephalus and it produces certain symptoms due to the pressure increase.
Indirect local lesion. Brain tumours not only cause symptoms because of direct damage to the tissue, but also as a result of compression and inflammation in adjacent areas. These symptoms are usually less severe and respond better to tumour resection treatment.