Several diagnostic tests for brain tumors

The type of tumor is related to factors such as age and gender. The most common tissue type of brain tumor in children is glioma, followed by medulloblastoma, craniopharyngioma and ependymoma. So what are the diagnostic tests for brain tumors?

1. Electroencephalogram (EEG) and electroencephalogram (EEG) are diagnostic tests for brain tumors with high localization value, but they are difficult to diagnose for tumors in the midline, deep in the hemisphere, and under the tentorium.

2. Evoked potential recording: Give the examinee a specific stimulus and record the electrical signals of the corresponding area of ​​his brain. The following are the evoked potential recordings with application value in the diagnosis and examination of brain tumors: ① Visual evoked potential, used to diagnose lesions or tumors in the visual conduction pathway; ② Brainstem auditory evoked potential (BAEP), used to record abnormal potentials of lesions or tumors in the cerebellopontine angle and brainstem; ③ Somatosensory evoked potential, used to assess brain function in patients with intracranial tumors.

3. X-ray examinations of the nervous system include skull radiography, ventriculocisternography, cerebral angiography, etc. Since ventriculography is traumatic, it has been replaced by CT and MRI for the diagnosis of brain tumors.

4. Brain computed tomography has a high application value in diagnosing brain tumors. After intravenous infusion of contrast agent, the density contrast of intracranial structures can be more obvious, thereby enhancing its resolution and making the image clearer, which can greatly improve the diagnostic rate of CT.

5. Magnetic resonance imaging Magnetic resonance imaging technology has a far better resolution than CT, and has the advantages of no X-ray radiation, high contrast, and multi-layer scanning and reconstruction. Magnetic resonance angiography technology has partially replaced DSA and cerebral angiography for the diagnosis of brain tumors because it can clearly show the blood flow of intracranial blood vessels.

6. Positron emission tomography. The principle of positron emission tomography is based on changes in tissue metabolism. Because the degree of glycolysis in tumor tissue is high, this technology measures the degree of glycolysis in tissue to distinguish between normal tissue and tumor tissue and understand the malignancy of the tumor.

The above are the diagnostic examination methods for common brain tumors. I hope everyone can have a systematic understanding and have a deeper understanding of the disease.

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