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Biomedical subjects

S Munemoto

Publications and source records attributed to S Munemoto.

36 records · Page 2Linked to original sources
PubMed1986

[A large AVM extensively involving the parietal region and posterior fossa].

A 47-year-old male was concerned with a large AVM involved extensively in the parietal region and the posterior fossa. Radiological examinations showed multiple radiolucencies in the parietal and occipital bone and torturous vascular nets (nidus) in those bones on the angiograms. Nidus was found also in the dura mater in the posterior fossa. Therefore, this case seemed to be an extremely rare case of calvarial AVM in the parietal region with the mixed calvarial dural AVM in the posterior fossa. His symptoms were bruit, transient hemiparesis and Gerstmann's syndrome in addition to the symptoms due to raised intracranial pressure. Favorable results of therapies could be attained by extensive exfoliation of dura mater from the cranial bone and incision of proximal dura mater in the sinus.

Arteriovenous Malformations↗
PubMed1985

[Intraventricular and intracerebral hemorrhage as complication of hemodynamic therapy for vasospasm after subarachnoid hemorrhage--analysis of 2 cases].

Intraventricular and intracerebral hemorrhage were observed in two patients (36-year-old male and 45-year-old female) whose ischemic deficits from vasospasm after subarachnoid hemorrhage due to ruptured aneurysm were treated or prevented with hemodynamic therapy. Both patients had a long history of arterial hypertension and showed high values of urinary catecholamine after subarachnoid hemorrhage. The cause of hemorrhage seemed to be the induced hypertension and the volume expansion in one case and the uncontrolled hypertension and the volume expansion in the other case. Although two patients were treated with the volume expansion therapy continuously after hemorrhage, neurological status deteriorated due to infarction caused by vasospasm. We discussed the limit and risk of hemodynamic therapy for patients who had a long history of arterial hypertension and increased catecholamine release after subarachnoid hemorrhage.

Adult↗
PubMed1985

[A case of huge diploic epidermoid of the temporal bone with intratumoral hemorrhage].

A case of huge diploic epidermoid which occurred in the right temporal bone and occupied almost all of the middle fossa and a part of the posterior fossa. CT of the tumor showed a low density lesion with multiform isodensity spots and a rim enhancement by CECT. Histologically, multiple old blood clots were recognized in this tumor contents. A review of the literature was made as regards CT findings of diploic epidermoid.

Adult↗
PubMed1985

[Traumatic hemorrhage in the basal ganglia in the child. Five cases].

Traumatic hemorrhages in the basal ganglia were seen in five children. The CT findings and the characteristics of these injuries were discussed. All of children were injured in car accidents. They ranged in age from 3 to 13 years. The patients comprised 3 boys and 2 girls. On admission, case 1 was conscious and case 2 was in a stupor. Case 1 and 2 were mild cases in which spotty hematomas were seen in the ganglionic region. They recovered fully. Case 3-5 were severe cases in which massive hematomas were seen in the ganglionic region. On admission, their consciousness ranged from stupor to coma. We performed operations on two of them but their recoveries were unsatisfactory. Their results were as follows. One had residual hemiparesis and dysarthria, one experienced tetraparesis and dysarthria and the last went from coma to a vegetative state. Concerning the directions of the impacts, 4 were hit in the frontal region or face and the last one received blows on the occipital region. Skull fractures were seen in two cases. Mandibula and clavicula fractures were seen in the other two cases. Only one child had no fractures. We conclude that pediatric traumatic hemorrhages in the basal ganglia are induced by severe impact on the frontal or occipital regions. The size of hematomas in this injury is spotty or massive. The massive type has a poor prognosis. On the other hand, the spotty type's prognosis is good. We speculate that impact to the head causes a shear strain in the ganglionic region. At that time, vessels in the area are injured.

Adolescent↗
PubMed1984

Association of persistent hypoglossal artery, multiple intracranial aneurysms, and polycystic disease.

A case of multiple intracranial aneurysms associated with a persistent hypoglossal artery and polycystic disease of the liver and kidneys is reported. The persistent hypoglossal artery was seen on the right side, and the left vertebral artery was hypoplastic. There were three aneurysms, each of which was located on bifurcations of right and left middle cerebral artery, and basilar artery. They were successfully treated by direct approach.

Arteries↗
PubMed1981

[Aspiration of hypertensive intracerebral hematoma by stereotactic technique (author's transl)].

Stereotactic aspiration of hypertensive intracerebral hematoma was performed in 10 patients. The patients selected for this operation had localized putaminal, thalamic hematoma and thalamic hemorrhages with ventricular penetration. The aspiration technique employed here could not remove the total hematoma, but did evacuate between half and two thirds of the volume estimated by CT scan. The target point determination was made by CT scan. In 6 patients with localized hematomas, the operation was carried out between 18 and 60 days after the hemorrhage. Three patients operated on between 18 and 26 days after the hemorrhage recovered markedly from hemiparesis and aphasia, while the remaining 3 patients operated on between 40 and 60 days showed no improvement in spite of the hematoma evacuation. In 4 patients with thalamic hemorrhage with ventricular penetration, continuous ventricular drainage was made as a first choice. About 2 weeks after starting the drainage, the remaining hematoma located in the thalamus was evacuated by the stereotactic technique. Marked improvement in consciousness and from aphasia were observed while there was a slight reduction in hemiparesis and sensory disturbance after surgery. Stereotactic method is only slightly traumatic, hence the technique described here may be indicated in patients with deep-seated hematomas, especially in the thalamus.

Aged↗
PubMed1978

Intracranial pressure in patients with diffuse cerebral arterial spasm following ruptured intracranial aneurysms.

Intracranial pressure (ICP) was recorded continuously in 12 pre-operative patients with angiographic evidence of diffuse cerebral arterial spasm due to a ruptured intracranial aneurysm. Recordings were made for 1 to 7 days, starting within 13 days after the haemorrhage. 1. An increased ICP was observed in the first week after subarachnoid haemorrhage (SAH) in 4 of the patients without any signs of angiographic arterial spasm. 2. This initial increase was regularly followed by a depression of ICP in between 7--12 days after SAH. In 11 out of 12 patients such a depression was concomitant with the beginning of arterial spasm. During the period of depressed ICP pattern, 6 patients showed little or no neurological deterioration, whereas 5 patients showed impaired consciousness or neurological deficits. 3. A secondary rise of ICP thereafter always followed due to ischaemic brain swelling or infarction, and was usually associated with a serious neurological deterioration. 4. Continuous ventricular drainage was performed to control the secondary increased ICP in 7 patients who survived, 4 of them with good clinical improvement and 3 with severe neurological deficits. 5. In the stage of depressed ICP, the administration of isoproterenol and steroids is recommended in order to try to alleviate the secondary rise of ICP.

Acute Disease↗
PubMed1977

[Aneurysmal bone cyst of the frontal bone (author's transl)].

A six year-old boy. He complained of a swelling of the left forehead since October of 1971, the region of his upper eyelid has then been gradually swollen. He was admitted to our institute on the 24th of February, 1973, without the past history of head trauma. We found that the swollen region had a diameter of about 4 centimeters covered from the left upper eyelid to the forehead with a slight tenderness on pressure. We had no neurological findings. According to the results of skull X rays, the superior margin of left orbit and zygomatic process of frontal bone were swollen and like honey combs. An irregular, long and narrow osteolytic legion was found, which was about 4 centimeters long and 5 centimeters wide. According to the results of the left selective external carotid angiography, after injection of 60% Urografin, for more than 2.5- 10 seconds, at the left frontal bone an abnormal shadow (patchy contrast filling) was noted, which was about 4 centimeters long and 5 centimeters wide. After the direct injection of Urografid into the lesion, the cyst of one centimeter long and 3 centimeters wide was observed at the zygomatic process of the frontal bone. Operation was performed to excise the outer plate of the swollen bone and to curette the lesion after the ligature of the left external carotid artery. Histological examination showed many blood lakes and some multinuclear giant cells in the specimens and we diagnosed it was an aneurysmall bone cyst. This case is the first one of aneurysmall bone cyst confirmed by the selective external carotid angiography and the direct puncture of lesion.

Bone Cysts↗