temporal lobe tumor
Introduction
Introduction to temporal lobe tumor The incidence of temporal lobe tumors ranks second in cerebral hemisphere tumors, second only to the incidence of frontal lobe tumors. Common tumors are gliomas, accounting for 17.96% of the total number of intracranial gliomas, followed by meningioma, which accounts for 5.42% of the total number of intracranial meningiomas. In addition, metastases often occur in this area, which is more common in adults. The gender difference is not obvious. The function of temporal lobe is very complicated, and the function of some parts is not completely clear. In the early stage of the temporal lobe tumor, there are many typical clinical symptoms, and the diagnosis is difficult. Especially the tumor is located on the right side, and most of them only show symptoms of increased intracranial pressure. It has few symptoms and signs, so it has been called "quiet zone" or "dumb zone" in clinical practice, so early diagnosis is more difficult. basic knowledge Sickness ratio: 0.0001% Susceptible people: more common in adults Mode of infection: non-infectious Complications: epilepsy
Cause
Causes of temporal lobe tumor
The cause of this disease is unknown, some scholars believe that it may be related to trauma, heredity, diet, and stress.
Prevention
Temporal lobe tumor prevention
It is very important to maintain a good attitude, to maintain a good mood, to have an optimistic, open-minded spirit, and to be confident in the fight against disease. Don't be afraid, only in this way can you mobilize your subjective initiative and improve your body's immune function.
Complication
Temporal lobe tumor complications Complications
Occurrence of hemianopia, visual impairment, epilepsy and other diseases.
Symptom
Symptoms of temporal lobe tumor common symptoms orthodontic disorder dream hallucinations hook back seizure sensory oculomotor nerve paralysis tinnitus ataxia expression indifference
Visual field change
Changes in visual field are often one of the early symptoms of temporal lobe tumors and have a localized significance. When the tumor is located in the deep part of the temporal lobe, due to the influence or destruction of the optic tract or visual radiation, a visual field defect of 1/4 of the contralateral isotropic upper quadrant may occur at the beginning of the disease. When the tumor continues to increase, the quadrant defect can develop into isotropic hemianopia. This hemianopia may be complete or incomplete, bilaterally symmetric or asymmetrical, such as hemianopia in the posterior temporal lobe. .
2. Sensory aphasia
Sensory aphasia can occur when the tumor in the dominant hemisphere is damaged in the 41st and 42nd regions of the upper back. When the back of the temporal lobe is damaged, a nominal aphasia can occur. This is one of the most reliable symptoms for the diagnosis of temporal lobe tumors. The ability of such patients to understand other people's language and the ability to name items is lost, but the ability to save speech, though, often uses typos, misrepresentations, and even many words. In severe cases, the patient's conversation cannot be understood at all, and the patient cannot understand the language of others. In addition, the temporal lobe tumor develops toward the occipital occipital, and there are often symptoms such as loss of reading, loss of writing, calculation, and visual agnosia.
Examine
Examination of temporal lobe tumor
1. Skull flat film
There may be increased intracranial pressure, tumor calcification, and the corresponding part of the temporal lobe tumor; local destruction and hyperplasia of the skull, and often coincide with the location of the tumor. The above examination of the flat film of the skull is often a reliable evidence for the diagnosis of temporal lobe tumors.
2. Ventricular angiography
Cervical angiography in temporal lobe tumors is mainly to determine the location of the tumor, and its performance characteristics are as follows:
(1) The anterior and posterior image side lateral ventricles are displaced to the healthy side. The transparent septum and the third ventricle are curved in an arc shape to the opposite side. The outer corner of the front corner becomes sharper and points to the outer or upper side. The lateral side wall of the lateral brain is sunken and the transverse diameter becomes smaller.
(2) The lateral image changes in the lateral image and the front and rear images, and the change in the lower corner is obvious. When the tumor is located above the lower corner, the lower corner is displaced, and the displacement may be all or part; below the lower corner, the lower corner is moved upward; the tumor is located on the outer side, the lower corner is moved inward; and the inner side is moved outward. When the lower corner is displaced, the distance between the lower corner and the body becomes smaller.
3. Cerebral angiography, carotid angiography of temporal lobe tumor
The location of the tumor is mainly in the case of vascular displacement.
Diagnosis
Diagnosis and differentiation of temporal lobe tumor
(A) temporal lobe abscess often has pulsatile, although the body temperature is sometimes increased, but most of the normal, blood like white blood cells and erythrocyte sedimentation can increase, cerebrospinal fluid protein increase is often more obvious than white blood cells, brain ultrasound can appear midline wave to the opposite side shift And abscess waves, cerebral angiography has a characteristic performance, CT examination can show a clear low-density area.
(B) subdural hematoma can be diagnosed by means of brain ultrasound, isotope brain scan, brain CT and other examinations, especially cerebral angiography, when the fusiform avascular area is seen on the anterior and posterior images.
(C) cerebrovascular accident and hypertensive encephalopathy When a patient suffers from hypertension, arteriosclerosis, it is easy to be considered a cerebrovascular accident and ignore the diagnosis of intracranial tumors. In severe hypertension, acute brain edema may occur, and may also occur severely. Headache, vomiting, papilledema, vision loss and various focal brain symptoms. For patients with difficult identification, cerebral angiography and CT examination can be used to determine the diagnosis.
(D) sphenoid bone tumors Skull plain film can be seen in the corresponding site of bone destruction or hyperplasia, cerebral angiography and CT examination, have characteristic changes, easy to identify with temporal lobe tumors.
(5) Cranial fossa tumors Cerebral angiography shows that the siphon segment of the internal carotid artery is obviously open, the middle cerebral artery is elevated, and the tumor pathological blood vessels are visible from the cranial fossa, which is easier to distinguish from the temporal lobe tumor.
(6) Thalamic tumors Can not be seen in both eyes, pupils are not equal, tinnitus, hearing impairment, etc., summarized above, for patients with increased intracranial pressure, such as "two biases" or "three partial" symptoms, mental symptoms or basal ganglia symptoms, etc. Should consider the possibility of thalamic tumor first, and then through EEG examination, isotope scan, ventriculography or CT examination, it is not difficult to identify with temporal lobe tumor.
