[Prognosis and long term survival of intracranial aneurysms operated under hypervolemic hypotension--natural history of 104 cases of intracranial aneurysms (author's transl)].
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Biomedical subjects
Publications and source records attributed to S Ishimori.
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Fifty cases of intracranial aneurysms were operated upon under hypervolemic hypotension. The cerebral metabolism was maintained within normal range. The dissection and clipping of the aneurysm were considerably easier, and a premature rupture of the aneurysm could be handled without difficulty. The advantages and the surgical results are discussed.
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Colloid cysts of the third ventricle are considered as a relatively rate benign tumor, consituting approximately 0.5% of the whole brain tumors, but the surgical cases have rarely been reported in Japan. In this paper, two cases of colloid cyst are reported and the pathogenesis, the importance of the clinical diagnosis and dramatic results after complete extirpation was emphasized. In Case 1, a 29 year-old right handed male, who showed definite symptoms of increased intracranial pressure without lateralizing signs, was diagnosed as colloid cyst of the third ventricle, and operated on with dissecting microscope on April 20, 1973. The colloid cyst was totally removed and postoperatively V-A shunt was performed for adhesive arachnoiditis. Patient did well after surgery and has returned to the previous work. In Case 2, a 41 year-old male, who suffered from sudden onset of severe headache and bouts of frequent vomiting, was admitted to Tokyo Wome's Medical College Hospital on October 11, 1974. Right cerebral angiography revealed findings of increased intracranial pressure and third ventricle tumor was suspected. On October 13, progressively disturbed consciousness occurred. Immediate ventricular tap and continuous ventricular drainage could not regain consciousness and patient expired on October 30. In necropsy, colloid cyst to the third ventricle was found. As far as these are concerned, these cysts might be reasonably said as ventricular epithelial origin in view of the operative and histological findings. Some emphasis was also made in terms of dissecting microscope in removing this tumor, completely preserving the ventricular walls as well as the terminal veins under magnification.
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