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Biomedical subjects

T Kishikawa

Publications and source records attributed to T Kishikawa.

At least 127 records · Page 7Linked to original sources
PubMed1980

Angiographic diagnosis of acoustic neurinomas and meningiomas in the cerebellopontine angle--a reappraisal.

Forty-two acoustic neurinomas and seven meningiomas in the cerebellopontine angle were reviewed, and the radiological differential diagnosis of these tumors is discussed. Though enlarged internal auditory meati and characteristic CT findings were reasonably reliable indicators for the diagnosis of acoustic neurinomas, it was angiography which substantiated their correct diagnosis. An arcuate vein was frequently demonstrated with acoustic neurinomas, but never with meningiomas. Visualization of tangled veins seems to favor a diagnosis of acoustic neurinomas. Contrary to earlier reports, tumor stains were most frequently visualized using selective external carotid arteriography. The degree of tumor stains did not aid in differentiating acoustic neurinomas from meningiomas. The importance of using angiotomography, especially in the anteroposterior projection, and external carotid angiography during prolonged injections of large amounts of contrast media, is emphasized.

Basilar Artery↗
PubMed1980

Hypertrophy of the placenta and sacrococcygeal teratoma. Report of two cases.

This report describes two pregnancies complicated by hydramnios, fetal death and sacrococcygeal teratoma in the second trimester. In both cases the placenta was remarkably enlarged. It is postulated that the tumors behaved in the manner of A-V fistulas and produced forward failure in the fetus similar to what is occasionally seen with large chorangiomas.

Female↗
PubMed1980

Diurnal changes in calcium and phosphate metabolism in rats.

Diurnal changes in the metabolism of calcium and phosphate were studied in fasted conscious rats by use of a perfusion balance study method. On a light dark 12:12 h schedule and on a constant iv load of calcium among other nutrients, the animals exhibited a diurnal rhythm in which urinary excretion of calcium was low in the night and high in the day. This was accompanied by a reciprocal change in phosphate balance (high excretion in the night, and low in the day). The diurnal change was abolished by adrenalectomy. Thyroparathyroidectomy alone did not prevent the diurnal change. It was abolished, however, when thyroparathyroidectomy was followed by a constant infusion of parathyroid hormone (0.8 U/h). These data indicate the presence of a diurnal rhythm of calcium and phosphate metabolism in rats and the involvement of parathyroid and adrenal hormones in the genesis of the rhythms.

Animals↗
PubMed1980

Prolonged injection angiography for diagnosing intracranial neoplasms.

Prolonged injection angiography (PIA), in which large amounts of contrast material are administered for three or four seconds, was used to visualize the vasculature of 70 intracranial neoplasms. Tumor stains were demonstrated better with or solely by PIA in all pituitary adenomas with suprasellar extension and in most meningiomas. PIA was less effective in tumors with marked arteriovenous shunts or in low-grade gliomas. PIA is especially indicated when avascular or hypovascular masses are encountered on conventional angiography or when contrast enhancement is encountered on computed tomography (CT). PIA is also indicated to demonstrate neoplasms which are not enhanced with contrast media on CT since PIA demonstrates the venous anatomy surrounding the tumors especially well.

Adenoma↗
PubMed1980

Lymphography for fever of unknown origin-a reappraisal.

Among the lymphograms of 25 F.U.O. patients whose diagnoses were unknown after several weeks of detailed examinations, abnormalities were noted in 4. Of the 4 abnormal cases, 2 were finally diagnosed by superficial lymph nodes biopsies as having malignant lymphomas. The other 2 had no final diagnoses; though biopsies of enlarged superficial lymph nodes were performed, they showed only reactive hyperplasia. No exploratory laporatomy was performed among the 25 cases. We conclude that lymphography is not absolutely indicated in the evaluation of F.U.O.

Adolescent↗
PubMed1979

Prolonged injection angiography for diagnosing intracranial cavernous hemangiomas.

A case of intracranial cavernous hemangioma displaying feeding arteries, tumor stains, and venous pools is presented. Tumors of this type may simulate avascular masses on angiography; however, when surgically excised, they bleed profusely. A correct preoperative diagnosis can help avoid unnecessary incisions. Prolonged injection angiography clearly depicts the tumors and their venous pools, which may be pathognomonic of cavernous hemangiomas.

Adult↗
PubMed1978

Angiographic diagnosis of fourth ventricle tumors.

Twelve primary fourth ventricle tumors and 22 medulloblastomas occupying mainly the fourth ventricle were analyzed, with emphasis on the differential diagnosis, vascularity, and some unusual findings. Though both types of tumor often have identical manifestations, the correct diagnosis can be made in most cases by careful evaluation of the posterior inferior cerebellar artery, particularly the choroidal and nodular branches. Unusual findings in primary fourth ventricle tumors mimicking tumors of the pons and medulla oblongata are described, and possible explanations for these findings are discussed. The results of this study underscore the importance of angiotomography in the diagnosis of tumors of the fourth ventricle.

Adult↗
PubMed1978

Angiographic diagnosis of benign and malignant splenic tumors.

Fifteen cases of benign and malignant nodular splenic tumors, including six cysts, one hamartoma, two hemangiosarcomas, five reticulum cell sarcomas, and one Hodgkin's disease, are presented with their arteriographic manifestations. The value of splenic arteriography is emphasized, since it may provide rather specific information in the diagnosis of benign and malignant nodular splenic tumors. Differential diagnostic considerations are also discussed.

Adolescent↗