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Biomedical subjects

H Kuyama

Publications and source records attributed to H Kuyama.

47 records · Page 3Linked to original sources
PubMed1977

[Evaluation of the role of brain scintigraphy in pineal tumors (author's transl)].

From January, 1969 to December, 1975, 1700 patients underwent sequential brain scintigraphy with Tc-99-m-pertechnetate. All the scintigrams were obtained on a scintillation camera with high-resolution collimator in our clinic. Intracranial tumors were confirmed in 449 cases and 21 cases out of those were pineal tumors which were diagnosed by clinical symptoms, air study, angiography and Conray-or Myodil-ventriculography. In these pineal tumors, 14 (67%) out of the 21 cases had positive scan on scintigrams. All of our cases of teratoma (one case) and teratocarcinoma (two cases) showed clear abnormal uptake, though it had been reported that they do not tend to have positive results on scintigrams. We also performed scintigraphy on 11 cases out of the 21, both before and after 60Co radiation therapy. In the cases which showed either same grade or more increased abnormal uptake on scintigrams after radiation therapy, compared with that before radiation therapy, compared with that before radiation, their prognoses were poor. On the other hand, those cases which showed decreased abnormal uptake after radiation, have had a healthy daily activities. From these experiences, it may be concluded that brain scintigraphy is clinically valuable not only for making the diagnosis, but for evaluating the effect of radiation therapy and the prognosis in the cases of pineal tumor.

Adolescent↗
PubMed1976

[Treatment of spinal cord arteriovenous malformation by surgical excision combined with afferent vessel coagulation-report of a case (author's transl)].

A case of spinal cord arteriovenous malformation was reported, in whom serial selective spinal angiogram and pantopaque myelogram showed a successful demonstration of intramedullary nidus. A 25-year-old male was admitted with paraparesis, impotence, hypesthesia and hypalgesia in his legs in 1974. He was diagnosed to have a spinal cord arteriovenous malformation of so-called "glomus type" with intramedullary nidus by the selective spinal angiogram and pantopaque myelogram. The nidus was fed by the anterior spinal artery through the 8th intercostal artery, from which a major draining vein extended caudally, but there was also some cranial drainage. The arteriovenous malformation was treated by surgical excision combined with afferent vessels coagulation in order to prevent the rupture of the remaining intramedullary nidus. After operation the patient develop a transient analgesia and girdle pain at T9-10 level, but after 42 days he regained full muscle power in his legs and could run by himself, while sensory disturbance remained about the same as before surgery.

Adult↗
PubMedDate not supplied

Sequential changes in MR images of the brain in acute carbon monoxide poisoning.

Two cases of acute carbon monoxide poisoning are presented in this paper. Sequential magnetic resonance (MR) images of the brain showed abnormal lesions in the bilateral globus pallidus and/or in the subcortical white matter. The MR images disclosed that the severity of the white matter lesions correlated with the prognosis in acute carbon monoxide poisoning. However, they did not always correspond to the neurological condition in the acute and subacute stages.

Adult↗
PubMedDate not supplied

Chitosan polymer sizes effective in inducing phytoalexin accumulation and fungal suppression are verified with synthesized oligomers.

Biologically derived chitosan has been reported to induce pisatin and disease resistance response proteins in pea tissue and also to inhibit the germination and growth of some fungal pathogens. Stereo-controlled synthesis of chitosan tetramer, hexamer, and octamer allowed the precise verification of oligomer size required for biological activity. The octameric oligomer optimally induced pisatin accumulation and inhibited fungal growth, verifying previous results obtained with column-purified oligomers derived from crab shells.

Antifungal Agents↗