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Biomedical subjects

N Yashiro

Publications and source records attributed to N Yashiro.

At least 37 records · Page 2Linked to original sources
PubMed1987

Nuclear magnetic resonance imaging of a benign cystic teratoma in the retroperitoneum.

A retroperitoneal teratoma arising from the vicinity of the upper pole of the right kidney in an 18-year-old woman is described. The plain anteroposterior abdominal radiographs showed irregular calcific shadows with tooth-like calcifications within the right upper quadrant of the abdomen. The findings of a primary cystic teratoma in the retroperitoneum examined by computerized tomography and magnetic resonance imaging of the abdomen are presented. Sagittal and coronal magnetic resonance imaging scans were useful to determine the extent of the mass, and to distinguish the mass from adjacent structures and organs.

Adolescent↗
PubMed1987

Hepatic tumors: dynamic MR imaging.

Thirty-six patients with hepatic tumors (28 hepatocellular carcinomas, seven cavernous hemangiomas, one metastatic tumor) were examined with serial magnetic resonance (MR) imaging, after a bolus intravenous injection of 0.05 mmol/kg gadolinium-diethylenetriaminepentaacetic acid. A typical MR imaging pattern for hemangiomas (present in five of seven cases [71.4%]) was a lesion of diminished signal intensity on precontrast images, peripheral contrast enhancement during the bolus dynamic phase, and complete fill-in of high signal intensity on delayed scan images. Twenty-eight hepatocellular carcinomas showed a variety of contrast enhancement patterns during the dynamic phase. In 21 patients (75%), there was no area of high signal intensity within the tumor on the delayed phase. A peripheral halo with delayed enhancement was noticed in 12 patients (42.8%) Histologic correlation in hepatocellular carcinomas showed that the degree of contrast enhancement corresponded to tumor vascularity and that the peripheral halo corresponded to fibrous capsular structure.

Carcinoma, Hepatocellular↗
PubMed1987

Relationships between Jenkins Activity Survey scores and responsivity of the dopaminergic system in psychosomatic disorders.

First, the Jenkins Activity Survey (JAS) was administered to 150 healthy subjects and 127 psychosomatic patients. Next, the responsivity of the dopaminergic system of the hypothalamo-pituitary gland was measured in 81 of these psychosomatic patients by examining the effect of bromocriptine on plasma growth hormone levels. Subjects were classified as either responders or nonresponders based on their secretion patterns. Multidimensional scaling techniques successfully discriminated between healthy subjects, psychosomatic responders and psychosomatic nonresponders using the items of the JAS. Implications for treating nonresponder psychosomatics in Japan are discussed.

Adult↗
PubMed1987

Hepatic haemangioma: dynamic MRI using gadolinium-DTPA.

Six patients with hepatic haemangioma were examined with a 1.5 tesla magnetic resonance scanner before and immediately after bolus injection of 0.05 mmol/kg gadolinium-DTPA. Eight to ten spin-echo images (TR: 100 msec, TE: 20 msec, scanning time: 26 sec) were obtained through the region of the haemangioma. In all cases, dense contrast enhancement of the lesion was demonstrated. The enhancement spread in all directions from the lesion on subsequent delayed scans (high signal fill-in); a signal higher than that from surrounding hepatic parenchyma was present two minutes after contrast injection. Dynamic MRI is a promising method for the evaluation of hepatic haemangioma and it is more easily tolerated by patients than dynamic CT using iodinated contrast medium.

Adult↗