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Biomedical subjects

J Ikeda

Publications and source records attributed to J Ikeda.

At least 163 records · Page 9Linked to original sources
PubMed1982

Intracranial venous angiomas.

Publications in the scientific literature are controversial in regard to the clinical significance of intracerebral venous angiomas. The present study of 11 patients with venous angiomas underscores the clinical importance of these lesions as potential causes of cerebral hemorrhage and obstructive hydrocephalus. The clinical and radiographic manifestations in 9 of these 11 patients correlated well. In cases of venous angiomas, the venous phase of angiography must be carefully scrutinized, particularly in patients with subarachnoid or intracerebral hemorrhage. Some diagnostic problems related to the angiography of venous angiomas are discussed.

Adolescent↗
PubMed1981

Neuroradiological manifestations of suprasellar pituitary adenomas, meningiomas and craniopharyngiomas.

The radiological manifestations of 16 pituitary adenomas, six meningiomas and 14 craniopharyngiomas were reviewed. The differential diagnosis of these tumors is possible with a few exceptions when skull radiography, CT, angiography and metrizamide cisternography are carefully evaluated. Prolonged injection angiography (PIA) is particularly important for demonstrating the contours of pituitary adenomas and meningiomas. Metrizamide cisternography is indicated when the tumor contours are obscure using PIA, or when the differential diagnosis is uncertain.

Adenoma↗
PubMed1981

Primary intracranial sarcomas: radiological diagnosis with emphasis on arteriography.

The radiological manifestations of primary intracranial sarcomas may be non-specific and they vary widely according to their histological variations. Reticulum cell sarcomas, however, can be included in the differential diagnosis with a high degree of reliability when one observes a hypovascular mass with arterial encasement and deep medullary veins. Tumor vessels and tumor stains supplied by dilated feeding arteries suggest the possibility of a sarcoma of the brain or of the meninges in infants. Nine reticulum cell sarcomas, four undifferentiated sarcomas, and one fibrosarcoma are presented here with their radiological manifestations, especially on angiography.

Adolescent↗
PubMed1981

Cyst of the conus medullaris manifesting amyotrophic lateral sclerosis syndrome.

An intramedullary cyst of the conus medullaris was found in a 49-year-old man, who presented progressive amyotrophy in the lower extremities, without root pain or sensory impairment. The clinical manifestation resembled that of ALS, although there were some atypical features, such as urinary difficulty and atrophy in the lower limbs. Myelography demonstrated an intradural oval mass and a laminectomy revealed a cystic malformation of the conus medullaris. Drainage of the cyst resulted in a marked clinical improvement.

Amyotrophic Lateral Sclerosis↗
PubMed1981

Anomalous unilateral single pulmonary vein mimicking pulmonary varices.

Anomalous single pulmonary veins (AUSPV) is a rare anomaly of the pulmonary venous system. Six cases have been documented in the literature, and two additional are reported here. Since AUSPV mimics pulmonary varices on pulmonary angiography, careful interpretation of the pulmonary venous anatomy by bidirectional and stereoscopic angiography is mandatory for diagnosing this anomaly.

Adult↗
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

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↗
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↗