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  • 1
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Nous avons récemment développé un nouveau modèle pour reproduire les cancers biliares chez le cochon d'Inde. Nous avons évalué les effects de la cholécystokinine (CCK) qui a une action trophique sur le tube gastro-intestinal et sur le système pancréaticobiliaire, sur la carcinogénèse biliaire chez le cochon d'Inde. Les cochons d'Inde traités avec du N-nitrosobis(2-oxopropyl) amine (BOP) ont été divisées en quatre groupes. Dans le groupe I, on a injecté une gélatine hydrolysée, un solvant de la CCK en sous-cutanée. Dans les groupe II et III, on a injecté 2.5 et 25 μg/kg, respectivement. Dans le groupe IV, on a administré de la loxiglumide, un antagoniste des récepteurs de la CCK. La CCK a potentialisé de façon significative l'effet carcinogénique de la BOP dans les voies biliaires intra- et extra-hépatiques mais pas dans la vésicule ou dans le pancréas. La loxiglumide exerce un effet inhibiteur sur la carcinogenèse des voies biliaires intrahépatiques.
    Abstract: Resumen Recientemente adoptamos un nuevo modelo para la inducción rápida y reproducible de carcinoma biliar en el hámster. En el presente estudio se hizo la evaluación de los efectos de la colecistocinina (CCK), que posee acción trófica sobre el tracto gastrointestinal y sobre el sistema pancreático biliar, en cuanto a la carcinogénesis biliar en este modelo de hámster. Los hamsters tratados con N-nitrosobis(2-oxopropil)amina (BOP) fueron divididos en 4 grupos. En el grupo I se inyectó gelatina hidrolizada, un solvente de la CCK, por vía subcutánea. En los grupos II y III se administró CCK 2.5 y 25 μg/kg, respectivamente. En el grupo IV se administró loxiglumida, un antagonista de los receptores de CCK. La CCK promovió en forma significativa el efecto carcinogénico de la BOP en los canales biliares intra y extrahepáticos, pero no en la vesícula biliar o el páncreas. La loxiglumida ejerció un efecto inhibitorio de la carcinogénesis en la vía biliar intrahepática.
    Notes: Abstract We recently developed a new model for rapid and reproducible induction of biliary carcinoma in hamsters. In the present study, we evaluated the effects of cholecystokinin (CCK), which has a trophic action on the gastrointestinal tract and on the pancreaticobiliary system, on biliary carcinogenesis in this hamster model. Hamsters treated with N-nitrosobis (2-oxopropyl) amine (BOP) were divided into four groups: In Group I, hydrolyzed gelatin, a solvent of CCK, was injected subcutaneously. In Groups II and III, CCK 2.5 and 25 μg/kg were administered, respectively. In Groups IV loxiglumide, a CCK receptor antagonist, was administered. CCK significantly promoted the carcinogenetic effect of GOP in the intra- and extrahepatic bile ducts but not in the gallbladder or pancreas. Loxiglumide exerted an inhibitory effect on carcinogenesis in the intrahepatic bile duct.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to examine whether tauroursodeoxycholate (TUDC) and cholestyramine resin (CR) enhance biliary carcinogenesis in the hamster model. A cholecystoduodenostomy with dissection of the extrahepatic bile duct on the distal end of the common duct was performed on Syrian hamsters. The hamsters were then divided randomly into 3 groups: control group, TUDC-treated group, and CR-treated group. All animals received N-nitrosobis(2-oxopropyl)amine (BOP) to initiate pancreaticobiliary cancer. The experiment was terminated at week 16 and the number of neoplastic lesions was counted microscopically. In the TUDC group, the intrahepatic biliary carcinogenesis was more accelerated than that observed in the control group, but no promoting effect was seen in the pancreas, gallbladder, or extrahepatic bile duct. In the CR group, both the intrahepatic biliary and the gallbladder carcinogenesis were inhibited compared with that observed in the control group and the TUDC group. TUDC enhanced the intrahepatic bile duct carcinogenesis, whereas CR inhibited both the intrahepatic bile duct and the gallbladder carcinoma. Bile acids were suggested to promote biliary carcinoma in the hamster model.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2307
    Keywords: Intrahepatic bile duct carcinoma ; N-Nitrosobis(2-oxopropyl) amine ; Hamster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A subcutaneously transplantable cancer line from the intrahepatic bile duct (IHBD) induced byN- nitrosobis(2-oxopropyl) amine was established in Syrian golden hamsters. The doubling time of this tumour was 2.6 days when 2x105 tumour cells were inoculated subcutaneously (take-up rate was 100%). Growth of the tumour was significantly faster in male hamsters but neither oestrogen nor androgen receptors were detected in the tumour. The primary and all allograft tumours were tubular adenocarcinomas with fibrosis and a scirrhous pattern resembling human IHBD carcinoma of the peripheral type. Transmission electron microscopic findings showed irregular glands covered with numerous microvilli. Blood-group-related antigens including A, B and H were positive. P-Glycoprotein, which is an indicator of multidrug resistance, was also positive. Carcinoembryonic antigen and CA19-9 as general tumour markers of the biliary tract were negative. The deoxyribonucleic acid (DNA) pattern of this transplantable carcinoma was diploid. This newly established animal model of a transplantable IHBD carcinoma can be used to examine the mechanisms of synthesis and secretion of tumour-associated antigens and to study potential therapeutic agents.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1436-2813
    Keywords: cystic clip ; cystic tube ; choledocholithiasis ; T-tube
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effectiveness of the cystic tube (C-tube) and the cystic clip (C-clip) for primary closure of the common bile duct after choledocholithotomy was examined in 10 dogs, followed by an observation period of either 3 months (n=6) or 1 year (n=4). No early complications were observed in any of the animals either during or after surgery. The laboratory data were within the normal range during the observation period. No bile leakage or slippage of the C-clip was evident on fistulography from the C-tube in animals examined 5 days after surgery. The tube could be pulled out easily from the cystic duct without any bile leakage or slippage of the clip. A second operation to confirm late complications showed no adhesions around the common bile duct, no bile duct stenosis similar to the Mirizzi syndrome, and no cystic changes of the bile duct or biloma. Our newly designed C-clip for primary closure of the common bile duct after a choledocholithotomy therefore appears to be beneficial and applicable to clinical patients undergoing traditional as well as laparoscopic surgery.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Surgery today 16 (1986), S. 231-234 
    ISSN: 1436-2813
    Keywords: mucus-secreting cyst ; developmental cyst ; presarcral cyst
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A mucus-secreting presarcal cyst was found in a 49-year-old woman who complained of dysuria. A routine rectal digital examination revealed a retrorectal mass. Diagnostic imaging demonstrated a large presacral cystic tumor. The cyst was removed through a transsacral approach. Histologically, the cyst membrane consisted of squamous and columnar mucus-secreting epithelium, and was diagnosed as a mucus-secreting presacral cyst.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1436-2813
    Keywords: heterotopic pancreas ; bile duct dilatation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of a 77 year old woman with a heterotopic pancreas in the distal common bile duct is reported herein. The patient had no symptoms, but an ultrasound examination showed bile duct dilatation and subsequent endoscopic retrograde cholangiography demonstrated a spherical filling defect in the distal common bile duct. Under suspicion of a benign neoplasm in the common bile duct, resection of the common bile duct and hepaticojejunostomy using a Roux-en Y jejunal limb were successfully performed. Pathological examination revealed heterotopic pancreatic tissue in the distal common bile duct. This is only the ninth reported case of heterotopic pancreas occurring in the common bile duct or ampulla of Vater, and thus, a review of the literature is also given.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1436-2813
    Keywords: primary sclerosing cholangitis ; segmental type
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A rare case of the segmental type of primary sclerosing cholangitis (PSC) is reported herein. A 27 year old Japanese man with obstructive jaundice was referred to our hospital with a provisional diagnosis of bile duct cancer at the hepatic hilum. A PTCD tube had been inserted from the right anterior segmental duct and direct cholangiograms showed complete obstruction of the bile duct at the confluence of the right and left hepatic ducts. Resection of the extrahepatic bile duct and partial hepatectomy were thus performed, however, the postoperative histological examination revealed no malignant features. Instead, the lesion was shown to be compatible with PSC microscopically. A diagnosis of PSC was finally established on the basis of clinical features, cholangiographic appearance and the pathological report.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1435-5922
    Keywords: Key words: islet cell tumor ; non-functioning ; malignancy ; solid and cystic tumor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: A small non-functioning islet-cell tumor of the pancreas in a 79-year-old man is reported. Ultrasonography showed a solid small mass in the body of the pancreas. All laboratory data, including serum hormones and tumor markers, were within normal limits. A distal pancreatectomy was performed. Cut sections of the specimen revealed a small, hard, solid mass measuring 2.8 × 2.2 × 2.0 cm. Histologically, the tumor consisted of large acidophilic cells with round nuclei, and these cells were similar to those normally found in solid and cystic tumors (SCT) of the pancreas. However, the tumor cells were slightly positive for somatostatin and neuron-specific enolase. Ultrastructural studies revealed clear nuclei with no zymogen but immature neurosecretory granules in the cytoplasm of the tumor cells. These findings were consistent with those of non-functioning islet-cell tumors. We describe the clinical and histological differences between non-functioning islet-cell tumors and SCT based on an analysis of the literature.
    Type of Medium: Electronic Resource
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