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Biomedical subjects

K Someda

Publications and source records attributed to K Someda.

At least 19 recordsLinked to original sources
PubMed1986

Spontaneous disappearance of middle fossa arachnoid cyst after head injury.

A case of middle fossa arachnoid cyst is presented, which disappeared after head injury. Five days after the trauma, CT scan revealed subdural fluid collection in addition to an arachnoid cyst in the middle fossa on the same side. As the subdural fluid resorbed, the cyst became smaller and disappeared on the follow-up CT scans without surgical intervention.

Arachnoid↗
PubMed1985

[Ruptured cerebral aneurysm associated with aortitis syndrome: a case report].

In rare occasions, patients with aortitis syndrome have cerebral aneurysms and only seven cases have been reported so far. A case of aortitis syndrome complicated with basilar bifurcation aneurysm is reported. A 58-year-old woman, who had been hypertensive for 20 years and was diagnosed as pulseless disease 10 years ago, suddenly had severe headache and became unconscious on Feb. 17, 1983. Spinal tap performed 3 days after the onset demonstrated bloody cerebrospinal fluid. She was referred to our clinic 8 days following the ictus of subarachnoid hemorrhage. On admission, she was drowsy and had headache, neck stiffness, disorientation and left hemiparesis. Pulsation of the left common carotid and left radial artery was unpalpable. Angiography through the intraaortic catheter revealed occlusion of the left common and left subclavian arteries at their origin, confirming aortitis syndrome. Through the patent right vertebral artery, basilar artery was visualized and an aneurysm at the basilar bifurcation was noted. Seven cases reported in the literature were reviewed.

Aortic Arch Syndromes↗
PubMed1980

Gyriform calcification after purulent meningitis.

A 2-month-old baby developed bilateral frontoparietal gyriform calcification after purulent meningitis. Biopsy revealed severe cerebral cortical degeneration with many calcified foci. Another feature of interest was reabsorption of calcification over a period of 4.5 months.

Brain Diseases↗
PubMed1980

[A case of large germinoma in bilateral frontal region (author's transl)].

Though most of ectopic pinealoma occurs in the midline of cerebral base, only ten cases of frontal subcortical germinomas were reported in Japan as far as we know in literature. The patient, 20 year-old male, was admitted to our hospital because of blurred vision of the right eye and somnolence. Neurological examination on admission revealed bilateral choked discs and impaired visual acuity of both eyes with visual field defect of the right eye. A large deep bifrontal tumor was noted by cerebral angiography and pneumoventriculography done at the time of ventricular drainage. After subtotal removal of left frontal tumor and bifrontal V-P shunt, he came alert. No abnormality of posterior part of third ventricle was noted on the post-operative pneumonencephalogram. As the microscopic examination revealed that the tumor was germinoma of two-cell pattern, Co60 with a total dose of 5,900 rads was irradiated to the rest of the tumor. Brain scan with Tc99m 6 months after the surgery showed the disappearance of the tumor and CT scan 3 years later confirmed no recurrence of the tumor. Fine structure of the tumor was also presented and discussed.

Adult↗
PubMed1978

[Ischemic cerebral symptoms after subarachnoid hemorrhage due to aneurysmal rupture (author's transl)].

Among 169 patients treated at our clinic during past six years there were twenty-four cases (14 per cent) in which cerebral ischemic symptoms gradually developed after full recovery from SAH due to aneurysmal rupture. Duration form the aneurysmal rupture to the onset of ischemic symptoms varied from four days to fourteen days (8 days on average). As the initial symptoms hemiparesis and disturbance of consciousness (18 and 14, respectively) were two major symptoms, and those who showed disturbance of consciousness had more grave prognosis than those with hemiparesis. There were no correlations between the initial symptoms and the sites of aneurysm, but the ICA cases had definitely poor prognosis among those who developed ischemic signs after SAH. Those who became symptomatic within 7 days after SAH had poorer prognosis than those who showed initial symptom more than 8 days after SAH. On angiograms which were done shortly after the onset of symptoms, severe and extensive vasospasm was noted in all cases but four in which degree of vasospasm was not so severe and extensive. Operative treatment, when done within 5 days after the onset of ischemic symptoms had poorer results than when done over 6 days. As a conclusion, it is necessary to watch for possible onset of ischemic symptoms, especially in ICA patients, when seen later than four days after SAH. If ischemic symptoms were present and progressive, the operative treatment should be postponed until clinical course turns uphill by intensive treatments.

Adult↗
PubMed1978

[On the surgical treatment of cerebellar infarction (author's transl)].

Recently we have experienced two cases of acute uncomplicated cerebellar infarction which had been surgically treated. Onset of the disease in both cases was an attack of vertigo with nausea and vomiting, followed by the signs of an expanding lesion in the posterior fossa. There were thirty-one surgically treated cases and only six were fatal so far as we have reviewed cases reported in the literature. The clinical pictures of cerebellar vascular accident are typical in most cases and those of cerebellar infarction are similar to those of cerebellar hemorrhage. These two are frequently indistinguishable on the clinical as well as angiographic grounds, however, CT-scan may be of great value in the differential diagnosis. It is important to realize the cerebellar infarction is also a surgical lesion and not to spend valuable time in differentiating cerebellar infarction from cerebellar hemorrhage. Low mortality rate and low morbidity in cerebellar infarction adequately treated surgically confirm importance for early exploration.

Acute Disease↗
PubMed1977

Arteriovenous malformations in the posterior fossa.

We have operated on 12 of 14 cases of arteriovenous malformation (AVM) in the posterior fossa since 1968, with one death. The lesions were in the cerebellum in 10 cases (three anteromedial, one central, three lateral, and three posteromedial), and in the cerebellopontine angle in two; in two cases the lesions were directly related to the brain stem. The AVM's in the anterior part of the cerebellum were operated on through a transtentorial occipital approach.

Adult↗
PubMed1975

[Subcutaneous preservation of free skull bone flap taken out in decompressive craniectomy (author's transl)].

The best material for cranioplasty of large skull bone defect as a result of decompressive surgery is a patient's own bone flap, since it fits exactly where it was and no recipient's reactions are elicited. Ideally the bone flap should be alive. However, there have been no effective ways to keep a bone flap alive. We have attempted to preserve a free bone flap in a sterile and living state by keeping it subcutaneously in the thigh. The reasons we choose this site for temporary implantation are as follows: 1) Sufficient space can be easily made to accommodate a bone flap. 2) Curvature of a bone flap fits that of a thigh without difficulties and extreme protrusions caused by implanted bone flap can be avoided. 3) The site of storage is well away from the operative field and independent from each other. 4) It is possible to get the fascia lata through the same skin incision for a large dural patch when needed. When the bone flap is too large to be comfortably accommodated and causes significant stretching and protrusions of the covering skin at the bone edge, it is simply divided into two pieces and these are implanted in the same place.

Decompression↗