pathology
At present, it has been recognized that long-term exposure to radioactive substances such as uranium, radium and its derivatives, carcinogenic hydrocarbons, arsenic, chromium, nickel, copper, tin, iron, coal tar, asphalt, petroleum, asbestos, mustard gas and other substances can induce brain cancer, mainly squamous cell cancer and undifferentiated small cell cancer.
Pathological introduction of brain tumor
Tumors that grow in the brain are generally called brain tumors, including primary brain tumors originating from brain parenchyma and secondary brain tumors that metastasize from other parts of the body to the brain. Primary brain tumors can be divided into benign and malignant according to their biological characteristics. Benign brain tumors have slow growth, complete capsule, no infiltration of surrounding tissues and good differentiation; Malignant brain tumor grows rapidly, without capsule, with unclear boundary, invasive growth and poor differentiation. Whether benign or malignant, normal brain tissue will be squeezed and pushed, leading to increased intracranial pressure and threatening people's lives.
Second: Brain tumor is a very serious disease.
First, because of the gradual enlargement of brain tumors, intracranial space-occupying lesions are formed, often accompanied by peripheral brain edema. When the compensation limit is exceeded, the intracranial pressure increases. When brain tumors block cerebrospinal fluid circulation or compress veins, resulting in venous reflux disorder, intracranial pressure is higher. If the brain tumor appears bleeding, necrosis and cyst formation, it can accelerate its progress.
Second, the brain tumor is enlarged, the local intracranial pressure is the highest, and a pressure gradient is generated between intracranial chambers, which causes brain displacement and gradually aggravates the formation of cerebral hernia. Tumors in the supratentorial hemisphere can produce subfascular hernia, and the cingulate gyrus moves across the midline, which can cause wedge-shaped necrosis. The peripheral angular artery can also be displaced due to compression, and in severe cases, cerebral infarction in the blood supply area can occur.
Third, patients with brain tumors are in a coma, their blood pressure rises, their pulse is slow, their breathing is deep and irregular, and they may have rigidity. When increased intracranial pressure reaches the critical point, the intracranial volume will continue to increase slightly, and the intracranial pressure will increase rapidly. When intracranial pressure is equal to arterial pressure, cerebral vascular paralysis, cerebral blood flow stops and blood pressure drops, and patients will soon die.
To carry out formal and professional treatment as soon as possible, most of the cases received missed the best treatment time, which increased the difficulty of treatment and brought irreparable harm to patients and their families.