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Biomedical subjects

S Matsutani

Publications and source records attributed to S Matsutani.

At least 91 records · Page 5Linked to original sources
PubMed1986

Tectal projection neurons to the retinopetal nucleus in the filefish.

Following horseradish peroxidase (HRP) injections into the preoptic retinopetal nucleus (PRN), neurons in the ipsilateral optic tectum were labeled retrogradely. Labeled neurons exhibited a 'Golgi-like' appearance, somata of these neurons were pyriform or round, and most of them were located in the stratum album centrale (SAC) or the stratum periventriculare (SPV). These neurons had a long apical dendrite, which ramified in the upper-half of SGC into horizontally arborized dendritic fields. The main trunk of the apical dendrites also gave off several branches in the stratum fibrosum et griseum superficiale (SFGS) and reached the stratum opticum (SO). These neurons resemble the 'large pyriform neurons' of Vanegas et al. (Vanegas, H., Laufer, M. and Amat, J., The optic tectum of a perciform teleost. I. General configuration and cytoarchitecture, J. Comp. Neurol., 154 (1974) 43-60) except that in the tecto-PRN neurons the axons originates from the apical dendritic shaft at or near the level of the SAC. Judging from their dendritic patterns, the tectal neurons projecting indirectly to the retina may receive non-retinal inputs besides the retinal input.

Animals↗
PubMed1986

Natural history of minute hepatocellular carcinoma smaller than three centimeters complicating cirrhosis. A study in 22 patients.

Twenty-two patients with cirrhosis and minute hepatocellular carcinoma less than 3 cm in diameter were followed for periods of 6-37 mo without specific treatment. The survival curve drawn by the Kaplan-Meier method showed a 1-yr survival of 90.7%, a 2-yr survival of 55.0%, and a 3-yr survival of 12.8%. The ultrasonic patterns of these masses in the liver were correlated with the size and showed a tendency to change from a low echo pattern to a low periphery and, finally, to a massive pattern. The growth speed calculated from the doubling time for tumor volume varied considerably from case to case with an average of 6.5 +/- 5.7 mo; it also changed in some cases during the observation period. Serum alpha-fetoprotein levels were generally low, rarely assisted in diagnosis, but tended to increase when the mass attained a diameter of greater than 3 cm; sudden acceleration in the rate of increase in alpha-fetoprotein level often coincided with a change of ultrasonic pattern to the massive one.

Aged↗
PubMed1985

Incidence of portal vein thrombosis in liver cirrhosis. An angiographic study in 708 patients.

Portal vein thrombosis was thought to be a common complication of liver cirrhosis in the past. The incidence of angiographically demonstrable portal vein thrombosis was studied in 708 consecutive patients with unequivocal cirrhosis seen in the past 10 yr in whom either transhepatic portography or superior mesenteric arterial portography clearly delineated the major portal vein system. Excluding 2 cases that were thought to be associated with past splenectomy, there were 4 cases of portal vein thrombosis related to cirrhosis, all in a decompensated stage. The calculated incidence of portal vein thrombosis was 0.573% of all cirrhotic patients without splenectomy in the past. They constituted 23.5% of the 17 cases of extrahepatic portal vein obstruction encountered during the same period. There were 78 cases of idiopathic portal hypertension similarly studied angiographically, and the incidence of portal vein thrombosis unrelated to splenectomy was 2.86%. A statistical survey based on 247,728 necropsies recorded in the Japan Autopsy Registries of 1975-1982 showed a 0.05489% incidence of portal vein thrombosis and a 6.58857% incidence of cirrhosis of all types among them, suggesting that portal vein thrombosis is not a common complication of cirrhosis in Japan in recent years.

Adult↗
PubMed1985

Membranous obstruction of the portal vein. A case report.

Membranous obstruction of the portal vein has not been previously reported. This 56-yr-old Indonesian man with a history of a tropical fever 5 yr earlier presented with variceal bleeding. Transhepatic obliteration of the varices was attempted, but the catheter placed in the right portal branch would not pass beyond the porta hepatis. Another catheter was inserted into the portal trunk under ultrasound guidance. Simultaneous opacification through the two catheters demonstrated a complete membranous obstruction of the portal vein at the porta hepatis and a portal-superior mesenteric-venous axis that had lost communication with incoming veins and the left portal branch, most likely because of multiple thrombosis. Other angiographic procedures also revealed marked hepatopetal collaterals (cavernous transformation) entering the liver through the hilum. Liver biopsy showed acute posttransfusion hepatitis superimposed upon portal fibrosis. The possible mechanism for membrane formation in relation to thrombosis is discussed.

Humans↗
PubMed1985

Association of gallbladder carcinoma and anomalous pancreaticobiliary ductal union.

A total of 96 patients with gallbladder carcinoma in whom direct cholangiography clearly opacified the pancreaticobiliary ductal union and the common channel, and 65 patients with an anomalous union of these two duct systems at a distance greater than 15 mm from the papilla of Vater (normally less than 4.6 +/- 2.2 mm, mean +/- SD) were studied. It was found that this anomalous ductal union occurred in 16.7% of the patients with gallbladder carcinoma in comparison with an incidence of 2.8% among 641 consecutive patients with various hepatobiliary and pancreatic diseases studied by endoscopic retrograde cholangiopancreatography who did not have gallbladder carcinoma. It was also found that gallbladder carcinoma occurred in 24.6% of the 65 cases of anomalous ductal union in comparison with a 1.9% incidence of this cancer among 635 consecutive patients similarly studied and found to have normal ductal union (p less than 0.001). Thus, a close etiologic association was suggested between this anomaly in the terminal segment of the biliary tract and gallbladder carcinoma. Of the 65 patients with anomalous ductal union, 50 had the so-called congenital cystic dilatation of the common bile duct and 15 did not. Five of the 50 (10%) and 11 of the 15 (73.3%) had gallbladder carcinoma (p less than 0.01), and this carcinoma seems to be related to anomalous ductal union rather than to cystic dilatation of the common bile duct. As a tumorigenic factor in this anomaly, regurgitation of pancreatic juice has been stressed.

Adult↗
PubMed1982

Amino acid amide derivatives of 2-[3-(aminomethyl)-4H-1,2,4-triazol-4-yl]benzophenones, a novel class of annelated peptidoaminobenzophenones.

A series of the title compounds was prepared via condensation of the 3-(aminomethyl)triazolylbenzophenone (5) with N-protected amino acids, followed by deprotection, amination of the 3-[(chloroacetamido)methyl]triazolylbenzophenone (6a,b), or reduction of the relevant azide derivative (6c). Some of the title compounds were also derived directly from the quinazolines 3 or 4 by acid-induced rearrangement, followed by deprotection. These new amino acid amide derivatives of the triazolylbenzophenones (2) were evaluated for central nervous system (CNS) activity. Members of this class of compounds exhibited a high level of CNS activities. For example, 2',5-dichloro-2-[3-[(glycylamino)methyl]-5-methyl-4H-1,2,4-triazol-4-yl] benzophenone (2c) was as active as triazolam, with an ED50 of 0.58 mg/kg (mice, po), against antifighting activity in the foot shock-induced fighting test. Other triazolylbenzophenone derivatives (2a-f) showed similar pharmacological activities.

Anesthesia↗
PubMed1981

Collateral veins in portal hypertension: demonstration by sonography.

The diagnostic value of real-time sonography for portal hypertension was assessed in 38 patients with collateral veins using a linear array scanner in comparison with percutaneous transhepatic portography. The frequency of detection of collaterals by sonography relative to that by percutaneous transhepatic portography was 85% for the coronary, 100% for the paraumbilical, and 10% for the short gastric veins. Sonography demonstrated the paraumbilical vein in three patients in whom portography failed to opacify it. Real-time sonography is perhaps the first-choice procedure for the demonstration of collateral veins and diagnosis of portal hypertension.

Collateral Circulation↗