Sphenoid ridge meningioma
Introduction
Introduction to sphenoid ridge meningioma The sphenoid ridge meningioma is a meningioma originating from the sphenoid bone and small wing. The inner part is from the anterior bed, and the outer part is the wing. The tumor is mostly spherical and can grow in all directions. basic knowledge Sickness ratio: 0.001%-0.002% Susceptible people: no specific people Mode of infection: non-infectious Complications: Cerebral infarction
Cause
The cause of sphenoid ridge meningioma
(1) Causes of the disease
No relevant information.
(two) pathogenesis
Most of the tumors are endothelial and fibrous. There are two kinds of tumor growth methods. One is expansive growth, which is nodular, with narrow pedicles, larger, and relatively easy to operate. Another kind of growth, It is carpet-like and has extensive adhesion to the dura mater of the skull base. It is difficult to completely cut the operation and forms different clinical manifestations according to its growth characteristics.
Prevention
Sphenoid ridge meningioma prevention
Prevention: Pay attention to food hygiene and avoid carcinogens such as benzopyrene and nitrosamines from entering the body. Pay attention to personal hygiene, exercise, enhance resistance and prevent viral infection. Avoid brain trauma, and should be cured in time when brain trauma occurs. People who have had an intracranial tumor should not give birth again.
Complication
Sphenoid ridge meningioma complications Complications
There may be some complications after craniotomy:
1. Physical motor dysfunction, excessive traction or vasospasm affects the motor center.
2. Sports aphasia, caused by excessive traction in the lower part of the frontal lobe.
3. Cranial nerve function damage, hemorrhage hemianopia, blindness, eye movement disorder, the first dysfunction of the trigeminal nerve.
4. Cerebral infarction, internal carotid artery, middle cerebral artery, anterior cerebral artery or lateral fissure vascular injury, caused by sputum.
5. Subthalamic lesions, caused by direct injury or ischemia during surgery.
Once the above complications occur, treatments such as microcirculation drugs, neuro-metabolic drugs, energy mixture agents, dehydration drugs, hyperbaric oxygen chambers and symptomatic treatment should be actively provided.
Symptom
Symptoms of sphenoid ridge meningioma common symptoms ocular protrusion, increased intracranial pressure, sphenoid vesicle olfactory disorder, localized sign, saddle deformation
The clinical manifestation of sphenoid ridge meningioma depends on the location of the tumor. The early symptoms of the medial type are obvious. The patient may have cranial nerve compression in the early stage, such as decreased vision. For example, the tumor is invaded into the orbit or sacral fissure, and the venous return is blocked. The patient may have symptoms such as eyeball protrusion. The medial type patient may also have symptoms of cranial nerve damage of II, IV, VI and V. Psychiatric symptoms and olfactory disorders are more common in tumors growing in the front cranial fossa, but less common. Lateral sphenoid ridge meningioma symptoms appear later, only headaches in the early stage and lack of localization signs, some patients can present with temporal lobe seizures, such as tumor invasion of the tibia, ankle bone bulge, tumor growth of these two types of patients When it is larger, it will cause muscle weakness and increased intracranial pressure in the contralateral limb.
Examine
Examination of sphenoid ridge meningioma
1. CT scan can be seen in the spherical growth of the tumor centered on the sphenoid ridge, the boundary is clear, the tumor shadow is obviously enhanced after contrast enhancement, such as tumor compression side vein, brain edema is more significant.
2. MRI scan MRI is meaningful for the diagnosis of this disease, MRI can show the relationship between tumor and sphenoid wing and eyelid, bone destruction, etc., especially for the medial type of sphenoid ridge meningioma, MRI can also provide tumor In relation to the internal carotid artery, sometimes the tumor encloses the internal carotid artery, or the tumor attaches to the cavernous sinus. These conditions have important reference value for surgical removal of the tumor, and the enhanced MRI image is clearer.
3. Cerebral angiography is no longer necessary for localization diagnosis, but it can provide the blood supply artery of the tumor, the adjacent relationship between the tumor and the main blood vessels. The blood supply artery of the medial sphenoid ridge meningioma mainly comes from the branch of the ophthalmic artery, such as the tumor forward. The development of the fossa can be seen in the blood supply to the anterior ethmoid artery. At the same time, the internal carotid artery siphon bending is opened. Sometimes the internal carotid artery is directly invaded by the tumor, which is characterized by irregular wall. The blood supply of the lateral sphenoid ridge meningioma mainly comes from the branch of the external carotid artery. For example, in the middle meningeal artery, typical radial tumor blood vessels appear. The tumor staining is more obvious in the venous phase than in the arterial phase. Due to tumor compression, the lateral middle image shows that the middle cerebral artery is generally raised. At the same time, cerebral angiography is seen. Arterial blood donors can simultaneously perform vascular embolization, which reduces surgical bleeding.
Diagnosis
Diagnosis and differentiation of sphenoid ridge meningioma
According to clinical manifestations, combined with CT and MRI, clinical diagnosis can be clearly made.
