Causes of Glioma

Written by Chen Yu Fei
Neurosurgery
Updated on September 18, 2024
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Currently, there is no consensus on the specific causes of brain gliomas. Most scholars believe they result from a combination of congenital genetic factors and acquired factors.

In the case of congenital factors, by tracing the medical history of patients with gliomas, it can be found that there is a tendency for a higher concentration of glioma cases among family members.

Acquired factors are mostly seen in severe cranial trauma, extensive gliocyte proliferation, or due to unhealthy lifestyle habits, exposure to carcinogenic chemicals, or long-term damage from highly polluted radiation, which may easily trigger the development of gliomas.

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Late-stage symptoms of glioma

The continuous growth of gliomas or the occurrence of tumor stroke hemorrhages can lead to very high intracranial pressure in patients in the late stages. This results in severe headaches with persistent attacks, accompanied by nausea and vomiting. Projectile vomiting is a typical manifestation of increased intracranial pressure. Patients may experience changes in consciousness, such as drowsiness, stupor, and coma. As the condition progresses to brain herniation, patients can fall into a deep coma, with either bilateral or unilateral pupil dilation and loss of light reflex. Vital signs become unstable, ultimately leading to death due to heart and respiratory arrest caused by the brain herniation.

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Early symptoms of glioma

For patients with glioma, in the early stages of the disease, symptoms often manifest as mild headaches, dizziness, nausea, and vomiting. The symptoms are usually mild and tolerable for patients, and most patients do not pay enough attention, which can easily lead to missed and misdiagnosis. However, as the tumor volume increases, the patient's symptoms of headache, dizziness, and other discomforts gradually worsen, and may even show episodic outbreaks and a persistent worsening state. In addition to headaches and dizziness, some patients also exhibit significant motor dysfunction, exhibiting symptoms such as hemiplegia and aphasia. Patients with severe conditions may even experience widespread intracranial pressure increase, and life-threatening conditions due to the induction of brain herniation.

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The etiology of glioma

At present, there is no definitive conclusion regarding the specific causes of glioma. Clinically, it is generally considered the result of a combination of congenital genetic factors and acquired environmental factors. Usually, it is believed that there is a significant familial aggregation tendency in the family medical history of patients with gliomas, with a higher incidence of gliomas among family members. Additionally, acquired factors, such as severe cranial trauma followed by extensive proliferation of neuroglial cells, may induce incidents. Furthermore, severe intracranial infections, including unhealthy lifestyles, poor living environments, and the influence of radioactive materials, could potentially lead to the occurrence of gliomas.

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What are the symptoms of glioma?

Patients with gliomas often exhibit a range of symptoms including significant headaches, dizziness, nausea, and vomiting. As the tumor grows, it typically leads to an evident increase in intracranial pressure. Besides the original symptoms, some patients may also experience marked declines in vision, visual field deficits, and papilledema. The growth of the tumor inevitably compresses surrounding tissues, nerves, and blood vessels, leading to a variety of symptoms of neurological damage, such as noticeable hemiplegia, aphasia, and even abnormal sensations in one side of the body, characterized by numbness, pain, and a pins-and-needles sensation.

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Gliomas grow where?

Glioma is a stubborn malignant tumor of the central nervous system that originates from neuroglial cells. Therefore, gliomas can occur anywhere there are neuroglial cells. Clinically, based on the common sites of the tumors, gliomas can be divided into supratentorial gliomas, which are mostly found in the cerebral hemispheres, frontal lobes, temporal lobes, and parietal lobes, and are less common in the occipital lobes. There are also infratentorial gliomas primarily in the cerebellum. Additionally, a few gliomas are found in the brainstem and spinal cord.