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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 733 (1994), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 733 (1994), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 733 (1994), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 4
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Trente-neuf malades atteints d'hyperparathyroïdisme associé à un syndrome MEN-I ont subi une intervention parathyroïdienne entre 1961 et 1985. Chez 21 d'entre eux il fut procédé à l'ablation de 1–21/2 glandes, chez 6 à l'ablation de 3–31/2 glandes, chez 18 à une parathyroïdectomie totale complétée par une transplantation de tissu parathyroïdien dans l'avant bras (9 de ces derniers avaient déjà été soumis à une intervention sur les parathyroïdes). La résection de 1–21/2 glandes s'est soldée par une hyperparathyroïdie persistante ou récidivante dans 18 (88%) des 21 cas, celle de 3–31/2 glandes par le même phénomène chez 2 (33%) des 6 opérés. En revanche après parathyroïdectomie totale suivie d'autotransplantation dans l'avant bras aucun cas d'hyperparathyroïdisme persistant ou récidivant ne se manifesta. Cinq sur 18 malades qui présentèrent une hypocalcémie permanente nécessitèrent un traitement complémentaire; cependant après modification de la technique opératoire seulement 1 sur 10 des malades accusa une hypocalcémie permanente. On peut conclure de ces faits que l'hyperparathyroïdisme associée à un syndrome MEN-I doit toujours être traité par chirurgie radicale. Dans cette série la parathyroïdectomie totale avec autotransplantation paraît supérieure à la résection de 3–3 1/2 glandes en raison de l'absence de récidive de l'hyperparathyroïdie et du nombre limité de patients présentant une hypocalcémie postopératoire de longue durée dès lors que l'autotransplantation est réalisée suivant la meilleure technique.
    Abstract: Resumen Treinta y nueve pacientes con hiperparatiroidismo (HPT) asociado con el síndrome de neoplasia endocrina multiple tipo 1 (NEM-1) fueron sometidos a cirugía paratiroidea entre 1961 y 1985. Veinte y uno casos tuvieron resección de 1–2 1/2 glándulas, 6 casos tuvieron resección de 3–3 1/2 glándulas, y 18 casos (9 de los cuales habían sido previamente sometidos a cirugía paratiroidea) tuvieron paratiroidectomía total con autotransplante en el antebrazo. La resección de 1–2 1/2 glándulas resultó en HPT persistente o recurrente en 18 (88%) de los 21 casos. Dos (33%) de los 6 pacientes que tuvieron resección de 3–3 1/2 glándulas desarrollaron enfermedad recurrente. Ninguno de los pacientes sometidos a paratiroidectomía total con autotransplante en el antebrazo exhibió HPT persistente o recurrente. Cinco (26%) de 18 pacientes presentaron hipocalcemia permanente que requirió terapia de suplencia. Después de una modificación en la técnica operatoria, sinembargo, sólo 1 de 10 apareció con hipocalcemia permanente. Se llega a la conclusión de que el HPT primario en el síndrome NEM-1 siempre debe ser manejado con cirugía radical. La paratiroidectomía total con autotransplante parece ser más favorable que la resección de 3–3 1/2 glándulas debido a la ausencia de HPT recurrente en esta serie y al limitado número de pacientes con hipocalcemia postoperatoria de larga duración siempre y cuando se emplee una técnica óptima para el procedimiento de autotransplante.
    Notes: Abstract Thirty-nine patients with hyperparathyroidism (HPT) in association with the multiple endocrine neoplasia type I (MEN-I) syndrome underwent parathyroid surgery from 1961 to 1985. Twenty-one patients underwent resection of 1–21/2 glands, 6 had 3–31/2 glands removed, and 18 (9 of whom had previously been subjected to parathyroid surgery) underwent total parathyroidectomy with autotransplantation to the forearm. Resection of 1–21/2 glands resulted in persistent or recurrent HPT in 18 (88%) of the 21 cases. Two (33%) of the 6 patients who underwent 3–31/2-gland resection had recurrent disease. After total parathyroidectomy with autotransplantation to the forearm, no patient had persistent or recurrent HPT. Five (26%) of 18 patients had permanent hypocalcemia requiring supplemental therapy. After a change in the operative technique, however, only 1 of 10 was permanently hypocalcemic. It is concluded that primary HPT in the MEN-I syndrome always should be treated with radical surgery. Total parathyroidectomy with autotransplantation seems more favorable than 3–31/2-gland resection owing to the absence of recurrent HPT in this material and the limited number of patients with long-standing postoperative hypocalcemia, provided that an optimal technique for autotransplantation was performed.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. A total of 121 consecutive patients with midgut carcinoid tumors underwent regular clinical control and 158 laparotomies for abdominal symptoms with 1 to 11 years (mean 5.2 years) of follow-up. Metastases were present in 93% of the patients at study inclusion and developed at initially uninvolved sites with an overall probability of 0.38. Patients without initial tumor spread developed mesenteric or liver metastases with the probability of 0.25 (mean delay 12 years), whereas those with mesenteric metastases exhibited a probability 0.56 to develop liver metastases (mean delay 6.1 years). Spread to extraabdominal sites in patients with mesenteric and liver metastases exhibited a probability of 0.22 (mean delay 4.3 years), and this spread was especially frequent (probability 0.60) in patients with only liver metastases at inclusion. Patients without the carcinoid syndrome (52%) mainly suffered from more or less episodic abdominal pain, nausea, and diarrhea. Marked mesenteric fibrosis detected at surgery ( n = 59) generally was accompanied by symptoms of abdominal pain and weight loss, and it often required urgent intervention due to intestinal obstruction or ischemia. Complete or partial symptom alleviation was accomplished in 82% of the operated patients, and generally was most auspicious after primary acute or subacute procedures ( n = 54). The complete or partial symptom improvements after surgery lasted for mean 5.3 years and tended to be longer after elective ( n = 50) than acute operations. The findings substantiate encouraging results of laparotomy in a compromised cohort of patients with midgut carcinoid tumors. Because the patients also displayed a generally slow progression of metastases, liberal indications for laparotomy should prevail in symptomatic and possibly also asymptomatic individuals with midgut carcinoid tumors.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Parmi 138 patients traités par chimiothérapie pour tumeurs carcinoïdes intestinales, 51 ont eu une résection de leur tumeur primitive ou une chirurgie de réduction des métastases mésentèriques ou hépatiques. Seize patients avaient déjà été opérés d'une résection intestinale ou, quand on avait considéré les tumeurs comme inextirpables, d'une dérivation intestinale ou d'une laparotomie exploratrice. Mis à part les symptômes en rapport avec le syndrome carcinoïde, la plupart (60%) des 51 patients se plaignaient en général d'une douleur abdominale intermittente semblable à celle de l'occlusion intestinale et une perte de poids. Chez 18 patients ces symptômes étaient aigus et associés à une occlusion intestinale ou à une malnutrition sévère. Tomodensitométrie et artériographie ont été employés pour mettre en évidence les métastases du mésentère et du foie. A la laparotomie, les tumeurs intestinales primitives étaient petites, avec en général moins d'un cm de diamètre, et il y en avait plusieurs chez 39% des patients. Des métastases du mésentère mesurant plus de 12 cm de diamètre étaient présentes chez 86% des patients. Ces métastases était souvent associées à une importante fibrose mésentérique et rétropéritonéale provoquant adhérences, angulation et occlusion de l'intestin et un début de gangrène intestinale chez 8 patients. Chez tous les patients sauf 6, nous avons pu enlever les tumeurs primitives avec une résection de l'intestin relativement limitée alors qu'il existait de grosses métastases du mésentère, souvent dissociables des vaisseaux mésentériques. Les métastases du foie, retrouvées chez 49% des patients, étaient en général bilatérales et multiples, et, chez 6 patients, réséquables. Nos résultats parlent en faveur de la chirurgie même chez les patients avec des tumeurs carcinoïdes de l'intestin, même évoluées, et confirment que cette intervention peut être associée à d'importantes améliorations symptomatiques et à des périodes de survie conséquentes.
    Abstract: Resumen Coincidente con el tratamiento médico antitumoral de 138 pacientes con tumores carcinoides del intestino medio, 51 pacientes fueron sometidos a cirugía con el propósito principal de remover los tumores primarios y disminuir la masa tumoral de metástasis mesentéricas o hepáticas. Dieciseis pacientes habían sido operados previamente con realización de resección intestinal o, cuando el tumor fue considerado no resecable, derivación intestinal o sólo laparatomía. Además de los síntomas relacionados con el síndrome carcinoide, la mayoría (60%) de los 51 pacientes presentó dolor abdominal intermitente y pérdida de peso, en 18 casos estos síntomas fueron severos y aparecieron asociados con obstrucción intestinal o con malnutrición severa. La tomografía computadorizada y la arteriografía demonstraron bien las metástasis mesentéricas y hepáticas. En la laparotomía los tumores intestinales primarios aparecieron como de tamaño pequeño, la mayoría de menos de un centimetro de diámetro, y múltiples en 39% de los casos. Metástasis mesentéricas hasta de 12 cm de diámetro ocurrieron en 86% de los pacientes. Tales metástasis con frecuencia aparecieron asociadas con marcada fibrosis mesentérica y retroperitoneal, produciendo fijación, angulación, y obstructión del intestino, así como gangrena intestinal incipiente en ocho pacientes. En todos los pacientes, menos en 6, se pudo resecar los tumores primarios mediante resecciones intestinales relativamente limitadas, aunque tumores muy voluminosos tuvieron que ser disecados de los vasos mesentéricos. Las metástasis hepáticas, presentes en 49% de los pacientes, generalmente fueron bilaterales y múltiples; en 6 pacientes se efectuó la resección de metástasis hepáticas mayores. Los resultados dan apoyo a la conducta de tratamiento quirúrgico también para los pacientes más comprometidos con tumores carcinoides del intestino medio y demuestran que la intervención puede resultar en considerable mejoría sintomática y sustanciales períodos de supervivencia.
    Notes: Abstract Coincident with medical antitumor treatment of 138 patients suffering from mid-gut carcinoid tumors, 51 patients were subjected to surgery with the principal aims of removing primary tumors and debulking mesenteric or liver metastases. Sixteen patients had previously been operated with intestinal resection or, when the tumors had been considered inexcisable, with intestinal bypass or laparotomy alone. Apart from exhibiting symptoms related to the carcinoid syndrome, the majority (approximately 60%) of the 51 patients had generally intermittent, subileus-like abdominal pain and weight loss. In 18 patients, these symptoms were pronounced and associated with intestinal obstruction or severe malnutrition. Computed tomography and arteriography efficiently demonstrated mesenteric and liver metastases. At laparotomy, the primary intestinal tumors were small, mainly less than 1 cm in diameter, and they were multiple in 39% of the patients. Mesenteric metastases measuring up to 12 cm in diameter were present in 86% of the patients. These metastases were frequently associated with a pronounced mesenteric and retroperitoneal fibrosis causing fixation, angulation, and obstruction of the bowel as well as incipient intestinal gangrene in 8 patients. In all but 6 patients, the primary tumors could be removed by comparatively limited intestinal resections although bulky mesenteric metastases were often dissected from the mesenteric vessels. Liver metastases, found in 49% of the patients, were generally bilateral and multiple, and major hepatic metastases were resected in 6 patients. The results support a role for surgery also in the more compromised patients with mid-gut carcinoid tumors and that such intervention may be associated with considerable symptomatic relief and substantial periods of survival.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gene deletions have been implicated as the ultimate event in oncogenesis of inherited neoplasia2'3. According to the two-mutation model, an inherited tumour results from unmasking of a recessive mutation at the disease locus. The first mutation is carried in the germ-line and predisposes to ...
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  • 8
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé On a obtenu la production de 3 anticorps monoclonaux IgG 2a après immunisation des souris avec des cellules dispersées provenant d'une tumeur carcinoïde de l'intestin grêle humain. Les coupes congelées, fixées à l'acétone, de 57 carcinoïdes primaires et métastatiques, ainsi que 2 tumeurs carcinoïdes rectales ont montré une réaction immune évidente, alors qu'une tumeur carcinoïde d'origine thymique restait non colorée avec les anticorps. Les 3 anticorps produisaient une coloration semblable. La réaction immune intéressait plus de 95% des cellules tumorales carcinoïdes, et était plus uniforme et plus intense dans les tumeurs primitives que dans les tumeurs métastatiques, mésentériques, hépatiques et ovariennes des tumeurs intestinales. L'étude en immunofluorescence des cellules de tumeur carcinoïde suspendues a démontré que les anticorps se fixaient à la membrane de surface de ces cellules. Les anticorps ont coloré les enérocytes du gros et du petit intestin, les cellules de la métaplasie intestinale de la muqueuse de l'estomac, et des cellules des adénocarcinomes colorectaux. Ont été également colorées les cellules des tumeurs pancréatiques endocrines produisant des polypeptides intestinaux vasoactifs, de la gastrine, de la somatostatine et/ou des polypeptides pancréatiques et de l'épithélium des canaux pancréatiques. Au contraire, la plupart des tissus humains normaux et anormaux, y compris ceux des insulinomes bénins et malins, n'ont pas réagi. Ces résultats indiquent que ces anticorps sont capables de reconnaître les antigènes de différenciation sur la surface cellulaire des tumeurs carcinoïdes qui sont préservées également sur les cellules endocrines et non endocrines de la muqueuse intestinale normale. L'activité bien définie des anticorps suggère qu'ils peuvent aider à caractériser histologiquement les tumeurs carcinoïdes. D'autres études sont nécessaires pour savoir s'ils peuvent servir à localiser ces tumeurs et peut-être même faire partie de l'arsenal thérapeutique contre ces néoplasies.
    Abstract: Resumen Se produjeron 3 anticuerpos monoclonales IgG 2a mediante la inmunización de ratones con células dispersas de un tumor carcinoide humano del intestino medio. Criosecciones fijadas con acetona de 57 tumores carcinoides del intestino medio primarios y metastásicos, y de 2 carcinoides del intestino distal (recto), demostraron conspicua inmunoreacción, en tanto que un carcinoide tímico apareció esencialmente no coloreado con los anticuerpos. Los 3 anticuerpos produjeron un patrón similar de inmunocoloración. La inmunoreacción incluyó más de 95% de las células del tumor carcinoide y fue más uniforme e intensa en los tumores primarios que en las metástasis mesentéricas, hepáticas, y ováricas de los tumores carcinoides del intestino medio. Estudios de inmunofluorescencia en células tumorales suspendidas demostraron que los anticuerpos se ligan a la membrana de superficie de las células. Los anticuerpos también inmunocolorearon enterocitos del intestino delgado y del intestino grueso, metaplasia intestinal de la mucosa estomacal, así como adenocarcinomas colorrectales. Tumores pancreáticos endocrinos productores de polipéptido vasoactivo intestinal, gastrina, somatostatina y/o polipéptido pancreático, así como el epitelio de los canales pancreáticos, también resultaron coloreados por los anticuerpos, en tanto que un gran número de otros tejidos humanos normales y anormales, incluyendo insulinomas benignos y malignos, aparecieron no reactivos. Los hallazgos indican que los anticuerpos reconocen los antígenos de diferenciación sobre la superficie de la célula tumoral carcinoide, preservados también en células endocrinas y no endocrinas de la mucosa normal del intestino. La restringida reactividad tisular de los anticuerpos sugiere que éstos pueden constituir instrumentos útiles para la diferenciación histológica de tumores carcinoides. Estudios ulteriores pueden revelar si son aplicables para inmunolocalización y aún para inmunoterapia de estos tumores.
    Notes: Abstract Three monoclonal IgG 2a antibodies were produced after immunization of mice with dispersed cells from a human mid-gut carcinoid tumor. Acetone-fixed cryosections of 57 primary and metastatic mid-gut carcinoid tumors as well as 2 hind-gut (rectal) carcinoids showed a conspicuous immunoreaction while a thymic carcinoid was essentially unstained with the antibodies. The 3 antibodies yielded a similar pattern of immunostaining. The immunoreaction comprised more than 95% of the carcinoid tumor cells, and it was more uniform and intense in primary tumors than in mesenteric, hepatic, and ovarian metastases of the mid-gut carcinoid tumors. Immunofluorescence studies on suspended carcinoid tumor cells showed that the antibodies bound to the surface membrane of the cells. The antibodies immunostained enterocytes of the small and large bowel, intestinal metaplasia of the stomach mucosa as well as colorectal adenocarcinomas. Endocrine pancreatic tumors producing vasoactive intestinal polypeptide, gastrin, somatostatin, and/or pancreatic polypeptide as well as the epithelium of pancreatic ducts were also stained with the antibodies, whereas a large number of other normal and abnormal human tissues, including benign and malignant insulinomas, were unreactive. The findings indicate that the antibodies recognize differentiation antigens on the carcinoid tumor cell surface preserved also on endocrine and nonendocrine cells of the normal bowel mucosa. The restricted tissue reactivity of the antibodies suggests that they may constitute useful tools in the histological characterization of carcinoid tumors. Further studies may reveal if they are applicable for immunolocalization and perhaps even immunotherapy of these neoplasms.
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  • 9
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Radiologically demonstrable pancreatic endocrine tumors are a frequent requirement for exploration in patients with multiple endocrine neoplasia type I (MEN-I). Such delayed intervention is accompanied by a 30% to 50% incidence of pancreatic endocrine metastases. This study explores biochemical tumor markers and operative findings in relation to preoperative pancreatic radiology in 25 MEN-I patients. They underwent pancreatic surgery with ( n = 19) or without ( n = 6) radiologic signs of primary tumor and absence of metastases upon conventional examination, including OctreoScan testing ( n = 10). Biochemical diagnosis required an increasing elevation of at least two independent pancreatic tumor markers. Tumor diameters averaged 1.1 cm (0–5 cm) and 0.9 cm (0.2–1.5 cm) in the patients with and without positive preoperative radiology, respectively. These investigations never displayed more than one of the consistently multiple tumors, and the results were falsely positive in 26%. Preoperatively unidentified regional or hepatic metastases were found at surgical exploration in 26% of patients with radiologic localization and in none of the others. Limited pancreatic tumor involvement necessitated intraoperative absence of metastases and pancreatic lesions ≤ 1 cm in diameter on palpation, intraoperative ultrasonography, and microscopy. It occurred in 37% and 50% of the patients with and without radiologic tumor localization, respectively. The number of positive tumor markers was similar for patients with limited and major disease (2.3 vs. 2.7), whereas four or more such markers were found in all those with malignancies. The mean marker level was higher in patients with radiologically demonstrable tumors and lower in those with limited disease, but with a substantial overlap. OctreoScan testing was negative in all cases with limited disease and was the single most sensitive method (75%) in the others. Limited pancreatic disease could not be identified preoperatively, and the present means of biochemical pancreatic tumor identification invariably involved the presence of at least one lesion ≥ 7 mm in diameter. Conventional pancreatic imaging is insensitive and nonspecific for recognizing even substantial pancreatic tumors associated with MEN-I.
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  • 10
    ISSN: 1573-2568
    Keywords: omeprazole ; colorectal cancer cell lines ; gastrin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The direct effects of omeprazole on colonic cells has not been evaluated. Controversy exists regarding the potential adverse effects of omeprazole on cell proliferation. In order to mimic thein vivo situation in the patient treated with omeprazole, proliferation cell culture experiments were performed, monitoring directly the effects of gastrin and omeprazole both alone and in combination. Three colonic cancer cell lines were used, two with neuroendocrine features (NCI-H716, LCC-18) and one (DLD-1) not known to have these features. In thesein vitro proliferation experiments, only the NCI-H716 colorectal cancer cell line responded to omeprazole by decreased proliferation (P〈0.05). The effect was concentration dependent shown for all doses of omeprazole used. Gastrin had a statistically significant effect on increasing proliferation in the NCI-H716 cell line alone but only at the highest concentration (10−6M). Omeprazole has a cytostatic effect on one of three colorectal cancer cell lines but the mechanism for this effect of omeprazole and its potential role in treatment awaits elucidation.
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