[Synthesis of related compounds of calycotomine. (Studies on the syntheses of heterocyclic compounds. CXCI.)].
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Biomedical subjects
Publications and source records attributed to S Shibuya.
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Management of isolated gastric varices with a gastropericardiac shunt (GPS) has not yet been established. We were able to control a case of isolated gastric varices with a GPS by percutaneous transhepatic obliteration (PTO) using a microcatheter. In this case, the main blood drainage route was not a gastrorenal shunt, so transvenous retrograde obliteration could not be performed and PTO using the microcatheter was applied. Percutaneous transhepatic splenic venography revealed that the gastric varices came from the posterior gastric vein and the main drainage route was a GPS. Gastric varices and their blood supply were superselectively embolized using platinum microcoils and absolute ethanol. Portal venous pressure did not change after PTO because the route from the left gastric vein to the azygos venous system was preserved. Computed tomography 7 days after PTO revealed that the gastric varices were completely obliterated by the thrombi. Plasma ammonia level, arterial ketone body ratio, and indocyanine green retention rate at 15 min were improved. We conclude that PTO using a microcatheter is a rational, effective, and safe therapy for isolated gastric varices with a GPS.
The treatment of special types of varices with portal hypertension has not yet been established. We were able to control 13 cases of special types of varices by percutaneous transhepatic obliteration (PTO). These 13 cases consisted of 2 esophagojejunal varices after total gastrectomy for gastric cancer, 1 stoma varices after abdominoperineal excision for rectal cancer, 2 mesenteric varices with encephalopathy, 1 gastric variceal rupture, 1 gastrorenal and gastroazygos shunt with encephalopathy, 3 giant bar-type esophageal varices, 2 isolated gastric varices with gastropericardiac shunts, and 1 isolated gastric varices with gastrophrenic shunt. The special types of varices were successfully embolized in all cases and there were no complications. We conclude that the PTO is still an effective and safe treatment for special types of varices with portal hypertension.
Chronic portosystemic encephalopathy (CPSE) is uncommon, and its management has yet to be determined. We have been able to control five cases of CPSE using transjugular retrograde obliteration (TJO), and we report our clinical results with this technique. All of the five patients were suffering from cirrhosis and had gastric varices and large gastrorenal shunts. According to Sherlock's classification, the grade of encephalopathy was II in two patients, III in two, and IV in one. According to Child's classification, one had class B and four had class C cirrhosis. TJO was performed using a 6-F angiographic catheter with an occlusive balloon 20 mm in diameter. Absolute ethanol and 5% ethanolamine oleate with iopamidol were used to obliterate the gastrorenal shunt. The gastrorenal shunt was successfully obliterated, and the encephalopathy improved to grade 0 after TJO in all cases. The portal flow volume increased significantly from 542 +/- 189 to 992 +/- 139 mL/min (p < 0.01). The plasma ammonia levels before and after TJO were 189 +/- 40 and 51 +/- 23 microg/dL, and the indocyanine green retention rates at 15 min were 44 +/- 13% and 27 +/- 12%, with both changes being significant (p < 0.01). Minor complications observed were fever of over 38 degrees C and tarry stools due to hemorrhagic gastritis in one patient, which was being controlled conservatively. One patient died of hepatocellular carcinoma 27 months after TJO. The other four patients survived without recurrence of CPSE 17-74 months (44 +/- 24 months) after TJO. We conclude that TJO can be adopted as a safe and effective treatment for CPSE.
We evaluated the transjugular retrograde obliteration (TJO) in treatment of gastric varices with gastrorenal shunt. Twenty patients with posthepatitic cirrhosis were included in this study. A cobra-shaped 5 French occlusive balloon catheter was inserted into the gastric varices or gastrorenal shunt through the internal jugular vein. As the sclerosants, absolute ethanol and 5% ethanolamine oleate with iopamidol were injected into the varices to make thrombi. In all cases, gastric varices were obliterated successfully. Endoscopic examination 3 months after treatment revealed the complete eradication of gastric varices in all cases. No major complications during or after therapy were observed. We think that TJO can be an effective method for the treatment of gastric varices with gastrorenal shunt.
A 59-year-old man experienced hematemesis 5 years after a total gastrectomy and Roux-en-Y esophagojejunostomy for carcinoma of the cardia. Endoscopic examination revealed the esophagojejunal blue small varices with cherry-red spots. Percutaneous transhepatic portography showed that the varices were supplied by the vein of the ascending jejunal limb. The 3-French microcatheter was inserted into this vein through the 5-French catheter, and 0.5 mL of absolute ethanol and 2 mL of ethanolamine oleate with iopamidol were injected, which visualized the esophagojejunal varices and obliterated varices at the same time. There were no complications during the operation, and the subsequent clinical course showed no further bleeding. We conclude that percutaneous transhepatic obliteration with a 3-French microcatheter is one of the most effective means of treating esophagojejunal small varices arising after a total gastrectomy.
Proton beam radiation therapy using 250 MeV protons was carried out on two patients with early gastric cancer (T1, N0, M0). One patient was an 85-year-old man with early gastric cancer of type IIa + IIc. The other one was a 70 year old man with early gastric cancer of type IIc. In both cases histological examination of biopsy specimens showed differentiated adenocarcinoma; distant metastasis was not found by other examinations. Both patients were considered inoperable due to their poor cardiac and/or respiratory functions. Therefore, it was decided to treat them by definitive proton irradiation, delivering total doses of 86 Gy and 83 Gy, respectively. In both patients, skin erythema that did not require any special treatment was found in the irradiation field. Hematobiological examinations did not show any abnormality. Although endoscopic examination at two years after irradiation in the former case and at seven months in the latter case showed persistent gastric ulcer at the site of the cancerous lesions, cancer cells were not found histologically. Therefore, we concluded that proton irradiation therapy was useful for inoperable early gastric cancers.