Abstract: Common intraventricular operation often brings about some server complications such as high fever, lost of consciousness, stress ulcer and serious encephaledema etc. this is changing with the development of minimally invasive neurosurgery. SLT contact laser has advantages of little thermal effect, slight brain tissue injury and working normally in liquid environment. Endoscopy makes it possible that the operation can be carried out in tiny space. Combination of both techniques mentioned above leads to convenient removal of cerebral tumors in vital part of the brain like ventricle, thalamus and cerebellopontile angle et at. with little even without brian harm or no complications. The article reports three cases of patient of grain tumors in the third ventricle and thalamus and underwent such operations. It also discusses the indications of this kind of operation and presented the experience about this aspect. !7
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