[Ultrasonography and CT of thyroglossal duct cysts].

A retrospective analysis of pathologically proved 7 cases of thyroglossal duct cysts was performed in an attempt to determine the characteristics of these lesions using both ultrasonography (US) and computed tomography (CT). US showed cystic mass with variable internal echoes or debris in 6 of 7 cases and internal septation in two. CT showed hypodense mass in all 4 cases of which attenuation value were higher than that of water, and rim-enhancement of the wall in one case.

[CT and sonographic diagnosis of retained surgical sponge].

Seven cases of pathologically proven retained surgical sponge were reviewed and classified into four types, depending on CT and US findings. Type I: CT shows a mass with tiny gas bubbles, and sonogram shows an echogenic area with strong posterior shadow. Type II: CT shows an irregular high density mass with no gas bubble, and sonogram shows an echogenic area with strong posterior shadow.

D-penicillamine-induced copper deficiency in suckling mice: neurological abnormalities and brain mitochondrial enzyme activities.

Brain mitochondrial enzyme activities were examined in 15-day-old suckling mice which were daily injected with D-penicillamine (DP), a chelating agent of copper. Newborn mice treated with DP (1 g/kg/day) showed retarded weight gain, hyperelasticity of skin, and a bizarre forelimb posture with subcutaneous edema on experimental day (ED) 7. Paraparesis or dragging of the hindlimbs was observed by ED 15.

[Efficacy of concentrated CDDP-lipiodol emulsion for hepatic arterial infusion therapy in patients with nonresectable hepatoma].

The efficacy of concentrated CDDP-Lipiodol Emulsion was experimentally and clinically studied in the treatment of nonresectable hepatoma. The commercially available CDDP was ten-fold concentrated into water in oil form. The agent was administered via hepatic artery in 26 patients with nonresectable hepatocellular carcinoma.

[CT findings in bilateral adrenal enlargement].

CT findings in ten patients with bilateral adrenal enlargement (six cases of adrenal metastasis, two cases of malignant lymphoma, one case of pheochromocytoma and one case of adrenal hemorrhage) reviewed. Four of six cases of adrenal metastasis showed asymmetrical adrenal enlargement on initial CT scans. Ring enhancement on postcontrast CT was recognized in one case of adrenal metastasis and one case of adrenal hemorrhage (subacute stage).

[Sex difference in operant behavior following single exposure to carbon monoxide in adult rats].

Sex difference of effects of single exposure of carbon monoxide (CO) on operant behavior was studied in adult rats. The animals were obtained by continued selective breeding and have a high level of avoidance ability and small individual differences (THA rat: Tokai high avoider rat). Experiments were conducted as follows: Exposure were carried out at the concentrations of 50, 100, 200 and 400 ppm of CO gas for 4 h in THA rats, and their operant behavior was studied by Sidman avoidance test conducted 1 h before and after CO exposure.

Acute thrombosis of the inferior vena cava and hepatic veins in patients with Budd-Chiari syndrome: CT demonstration.

We reviewed the CT findings in 17 patients with angiographically proved Budd-Chiari syndrome to determine the ability of CT to show acute thrombosis of the inferior vena cava (IVC) and hepatic veins. In eight patients with membranes (web or band) in the IVC, no thrombus was detected with CT or angiography. In the other nine patients, thrombi in the IVC and/or hepatic veins were seen as intraluminal filling defects that did not change in appearance on precontrast and postcontrast CT scans.

Effects of postnatal low-levels of exposure to styrene on behavior and development in rats.

Three groups of rats were exposed by inhalation to either clean air (control group) or styrene monomer at 25 and 50 ppm (styrene-exposed groups) for 7 h/day, 6 day/week, from 1 to 48 days of age. Compared to control group, Styrene-exposed groups showed significant delay in the following developmental indices: body weight gain, appearance of pinna detachment and incisor eruption. With respect to open-field activity, the styrene groups indicated longer latency to enter the field, less number of squares crossed and fewer rearings than those of controls.

Paravertebral arteriovenous malformation with venous connection to left iliac vein. Report of a case.

An unusual systemic arteriovenous malformation arising from the left 9th intercostal artery, taking a caudal course through the left paravertebral veins, eventually drained into the left ascending lumbar vein, as illustrated at computed tomography and angiography. An embryologic maldevelopment of the azygos venous system is not the only possible explanation for venous drainage in the caudal direction. We believe that predominant venous drainage can take place in either direction because of the potentially bidirectional flow in the vertebral venous systems.

[The effects of prenatal trimethyltin exposure on development and learning in the rat].

Developmental effects of single prenatal trimethyltin exposure were examined in THA rats. Pregnant rats were injected on gestational day 12 with single dose of trimethyltin chloride (TMT) ip at either 0, 5, or 7 mg/kg. Significant differences between treated and control offspring rats could not be observed in terms of body weight, pinna detachment, incisor eruption, eye opening, surface righting, cliff avoidance, pivoting, negative geotaxis and auditory startle.

Exophytic spread of hepatobiliary disease via perihepatic ligaments: demonstration with CT and US.

Eight cases of hepatobiliary disease located adjacent to or within the perihepatic ligaments (peritoneal reflections surrounding the liver) with exophytic spread along these ligaments (three abscesses from cholecystitis, two bilomas, two hepatic abscesses, and one hematoma from a ruptured hepatocellular carcinoma, with 16 ligamentous lesions: five in the hepatoduodenal ligament, four in the ligamentum teres, three in the falciform ligament, two in the gastrohepatic ligament, one in the transverse mesocolon, and one in the duodenocolic ligament) were studied with sonography and computed tomography. The locations of underlying diseases were the inferior aspect of the left lobe of the liver (three patients), the gallbladder (three patients), and the right hepatic duct (two patients). An understanding of the anatomic detail of the ligamentous attachments of the liver and the continuity of peritoneal ligaments is important in recognizing the ligamentous spread of hepatobiliary disease.

Neurobehavioral analysis of high-rate Sidman avoidance rat strain.

The neurobehavioral characteristics of the Tokai High-Avoider (THA) rats, which had an innate high-avoidance ability, were clarified by comparing with the Wistar rats from which the THA rat strain had been derived. THA rats performed superior learning and displayed small individual differences of learning performance, not only in the Sidman avoidance task, which had already been used in selective breeding, but also in two different tasks, namely water maze and two-way shuttle avoidance. No apparent difference was present in development, circadian rhythm, and open-field activity between the two strains.

CT of adrenal tumors: frequency and clinical significance of low-attenuation lesions.

The CT values of adrenal tumors were evaluated in 36 patients to determine the frequency and significance of negative CT values. Twenty-seven patients had adrenocortical adenomas (13 had primary aldosteronism, 12 had Cushing syndrome, and two had nonhyperfunctioning adenoma), one had adrenocortical carcinoma, and eight had pheochromocytomas. The CT values in primary aldosteronism (mean, 1.

[A case of hepatoma treated successfully with a percutaneous intratumoral injection of CDDP-PC-lipiodol suspension].

Reported is a case that was treated successfully with a percutaneous intratumoral injection of a CDDP-PC-Lipiodol Suspension (CPLS) of the viable tumor cells of a hepatoma after arterial injection therapy. Although the size of the viable tumor cells remained almost unchanged, a marked reduction in the level of the plasma AFP (484 ng/ml-35 ng/ml) was obtained after the percutaneous injection. No major complication was encountered except for minimal vomiting and mild transient abnormalities of the liver functions.

Right aortic arch with atresia of aberrant left subclavian artery: case report.

We report a case of right aortic arch with atresia of the proximal portion of the aberrant left subclavian artery, a rare congenital vascular anomaly. Differential diagnosis from other conditions including right aortic arch with isolation of the left subclavian artery is discussed.

Epidermal nevus syndrome with hemimegalencephaly: a clinical report of a case with acanthosis nigricans-like nevi on the face and neck, hemimegalencephaly, and hemihypertrophy of the body.

A 5-year-old boy with the epidermal nevus syndrome and hemimegalencephaly is reported. He had pigmented nevi on the forehead and neck, and hemihypertrophy of the body from the birth. He developed intractable seizures, mental retardation, and right hemiparesis.

Urinary hippuric acid excretion in everyday life.

The biological monitoring for exposure to toluene is based on the measurement of urinary hippuric acid concentration (HA-U). In occupational health, workers exposed to toluene are examined for HA-U, because collection of urine samples is easy. The HA-U of some designers in a great household electrical products corporation who did not use toluene occupationally showed relatively high values.

[Changes in blood toluene concentrations in rats under various kinds of exposure conditions and physical loads].

The present experiment was conducted under the assumption that exposure conditions (time of exposure, concentration of exposed substances and working intensity) should be taken into account in estimating the level of invasion of injurious substances into the human body. Experiments were carried out on rats under various exposure conditions of toluene and the toluene concentration in the blood was monitored for the estimation of its intake. The results were as follows; 1.