Positional diagnosis and qualitative diagnosis of brain cancer

The diagnosis of brain cancer mainly refers to localization diagnosis and qualitative diagnosis. Brain cancer located in the main functional area is easy to diagnose, but cancer lesions located in certain "dumb areas" and "quiet areas" are not easy to diagnose, and often require auxiliary examinations such as X-rays, CT, MRI, cerebral angiography, and ventriculography.

1. Localization diagnosis of brain cancer

The localization diagnosis of brain cancer refers to determining the specific location of the cancer, which mainly relies on asking about the medical history and detailed physical examination. If the patient has a localized motor epileptic seizure in one limb, it indicates that the lesion is limited to the motor area of ​​the contralateral cerebral cortex; if the patient mainly has difficulty speaking, it indicates that the cancer is mostly located in the posterior part of the inferior frontal gyrus of the left hemisphere; if the patient mainly has language comprehension disorders, it indicates that the cancer is located in the posterior part of the superior temporal gyrus of the left hemisphere; if the patient has unilateral limb ataxia, it indicates that the cancer is in the cerebellar hemisphere; if the patient mainly has progressive hemiplegia, it indicates that the cancer is located in the brain parenchyma near the internal capsule area; if the patient mainly has visual impairment, it indicates that the cancer is located in the sellar area, and so on.

2. Qualitative diagnosis of brain cancer

Qualitative diagnosis of brain cancer refers to determining the nature of the cancer. Qualitative diagnosis is generally based on localization diagnosis, because different areas of the brain have their own tumors. For example, tumors in the sella turcica are mainly pituitary adenomas; tumors in the cerebellar vermis are mainly medullary blasts; and acoustic neuromas are the most common in the pontine angle. Qualitative diagnosis of brain cancer often requires histopathological examination to provide guidance for treatment.