Focal symptoms

Introduction Focal symptoms are symptoms manifested by local neurological disorders caused by local brain lesions. It has clinical significance. Such as hemiplegia, single sputum, aphasia and so on. Can go to the hospital for neurology, brain surgery and Chinese medicine treatment. Clinical symptoms and signs are related to the nature, type, location, growth rate, age, and constitution of the tumor. Symptoms of increased intracranial pressure in the midline or ventricular system appear early and severe, especially when the tumor is adjacent to the interventricular orifice, the aqueduct and the median hole, the symptoms appear earlier, the brain parenchyma tissue edema is heavier, and the intracranial pressure is increased. Progressive edema reaction is relatively strong, and intracranial pressure is increased later.

Cause

Due to local encephalopathy (encephalopathy refers to local neurological disorders caused by genetic, congenital brain hypoplasia, brain trauma, brain tumor, cerebral hemorrhage, cerebral infarction, infection, chemical poisoning, etc.) Disorder is a syndrome of visceral dysfunction, including symptoms of circulatory system, digestive system function or sexual dysfunction, and most of the physiological functions of the human body are temporarily disturbed by psychosocial factors.

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Clinical symptoms and signs are related to the nature, type, location, growth rate, age, and constitution of the tumor. Symptoms of increased intracranial pressure in the midline or ventricular system appear early and severe, especially when the tumor is adjacent to the interventricular orifice, the aqueduct and the median hole, the symptoms appear earlier, the brain parenchyma tissue edema is heavier, and the intracranial pressure is increased. Progressive edema reaction is relatively strong, and intracranial pressure is increased later. Older patients have brain atrophy, and there is ample compensation space in the skull, combined with arteriosclerosis. The decrease of cerebral blood flow and the decrease of cerebral vascular permeability make the early brain edema reaction stronger and the intracranial pressure increase.

Differential diagnosis

Different syndromes can be caused by the different parts of the brain tumor. It is caused by tumor stimulation or destruction of local brain tissue and has the value of lesion localization. A brief description of the focal symptoms of brain tumors located in different sites is as follows:

Cerebral cortical tumor

Extensive brain lesions produce general symptoms such as headache, coma, convulsions, generalized convulsions, and dementia. Symptoms of localized lesions are dysfunctions caused by the absence of the nervous system in the brain lesions, which is not the functional localization of the brain structure itself. In general, the symptoms of frontal lobe lesions are mainly free movement, intellectual and mental activity disorders; parietal lobe lesions are early and typical cortical sensory disturbances; occipital lobe tumors are characterized by headache and visual impairment; Leaf epilepsy and visual field defects are the most common, and the auditory center is abnormal; island leaf lesions are mainly characterized by internal iliac autonomic dysfunction.

2. Carcass tumor

Here the tumors invade adjacent tissues, and the clinical manifestations are actually the result of impaired adjacent structures. The tumor in the front of the corpus callosum has progressive dementia and personality changes, which may be related to the tumor invading the frontal lobe. Tumors in the middle of the corpus callosum have bilateral motor and sensory disturbances, and the lower limbs are heavier than the upper limbs, which is associated with the invasion of the motor cortex on both sides. Tumors in the posterior part of the corpus callosum may cause symptoms similar to those of pineal tumors due to compression of the tetraploid, with pupils on both sides varying, photoreaction and regulation reactions disappearing, and the eyes may not look upwards, called Parinaud syndrome. Because the cerebral aqueduct is easily blocked, hydrocephalus and intracranial hypertension are more likely to appear. Clinical manifestations of progressive dementia with bilateral cerebral hemisphere damage and increased intracranial pressure should be considered.

3. Lateral ventricle tumor

Often no special symptoms, mainly symptoms of increased intracranial pressure. Visual symptoms, especially isotropic hemianopia, are common, and some patients may have psychiatric symptoms.

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