共查询到20条相似文献,搜索用时 15 毫秒
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背景与目的: 研究仙人掌原液的毒性。 材料与方法: 小鼠急性毒性试验、Ames试验、小鼠骨髓嗜多染红细胞微核试验、小鼠精子畸形试验、大鼠30 d喂养试验。 结果: 仙人掌原液雌、雄小鼠LD50均大于20.0 g/kg,属无毒物质;Ames试验、微核试验和精子畸形试验结果均为阴性;大鼠30 d喂养试验结果显示该样品30 d喂养对大鼠各项观察指标未见毒性作用。结论: 在本次实验条件下,仙人掌原液为无毒物质,未显示有遗传毒性和亚急性毒性作用。 相似文献
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Chronic experiments on CBA and C57B1 mice and acute experiments on CBA mice established: (a) carcinogenic effect of sodium nitrite given continuously with drinking water (0.1; 1.0 and 10.0 maximum allowable concentration) in combination with morpholine fed with bread, and (b) endogenous synthesis of nitrosomorpholine as a result of simultaneous intragastric administration of same doses of sodium nitrite and morpholine. Also, nitrosomorpholine and N-nitrosodimethylamine synthesis was observed in vitro following addition of low-dose sodium nitrite, morpholine and amidopyrine to human gastric juice. Carcinogenic hazard associated with low-dose nitrite consumption in humans is discussed. 相似文献
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背景与目的:研究仙人掌原液的毒性。材料与方法:小鼠急性毒性试验、Ames试验、小鼠骨髓嗜多染红细胞微核试验、小鼠精子畸形试验、大鼠30 d喂养试验。结果:仙人掌原液雌、雄小鼠LD50均大于20.0 g/kg,属无毒物质;Ames试验、微核试验和精子畸形试验结果均为阴性;大鼠30 d喂养试验结果显示该样品30 d喂养对大鼠各项观察指标未见毒性作用。结论:在本次实验条件下,仙人掌原液为无毒物质,未显示有遗传毒性和亚急性毒性作用。 相似文献
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中晚期贲门癌148例的外科治疗 总被引:3,自引:0,他引:3
目的 总结贲门癌手术治疗影响生存率的因素 ,提供今后工作参考。方法 对 14 8例经手术治疗的贲门癌患者进行术后并发症、绝对生存率的X2 检验。结果 本组切除率为 94.5 9% ,近半胃切除占 72 .14 % ,1、3、5年生存率分别为 67.9%、45 %和 2 4.3 %。病期、外侵程度和淋巴结转移等因素对 5年生存率有显著影响 (P <0 .0 1)。术后并发症以吻合口瘘及肺癌并发症为多见 ,其发生率为 3 .6% ,手术死亡率 1.4%。结论 提高生存率的关键在于早期诊断 ,根治手术和术后积极综合治疗。 相似文献
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目的探索胆囊癌的防治方法。方法分析29例胆囊癌病人临床资料、治疗方法及结果。结果术前诊断明确者21例,剖腹探查发现已属晚期,9例为Ⅳ期行根治术,12例为Ⅴ期未行根治术,均于术后1年内死亡。术前怀疑胆囊癌者5例,剖腹探查冰冻切片证实为Ⅴ期及Ⅳ期者各1例,Ⅴ期未行根治术,Ⅳ期行根治术,均于术后1年内死亡;Ⅲ期者3例,行胆囊癌根治术分别于术后10月、13月、17月死亡。2例术中冰冻切片发现的Ⅱ期胆囊癌,行胆囊癌根治术,分别于术后23月、26月死亡。1例意外胆囊癌属Ⅰ期胆囊癌,术后5年半死亡。结论要减少胆囊癌危害,重在及时治疗胆囊结石。 相似文献
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LARSEN CD 《Journal of the National Cancer Institute》1947,8(3):99-101
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褚光平 《中国肿瘤临床与康复》1999,6(6):32-32,31
目的通过总结胰头癌病人的临床表现和影象学检查结果来评价手术切除的可能性。方法总结32例胰头癌病人的临床表现和CT、磁共振(MRI)检查结果,判断肿瘤是否已发生邻近浸润或远处转移,以此来评价其手术切除的可能性。结果在22例作CT检查的病例中,判断正确的为17例,准确率为77.3%。作MR检查9例,全部判断正确,准确率为100%。结论某些特殊的临床表现和CT、MR检查对判断肿瘤是否发生邻近浸润或转移有较大价值,为术前评价手术切除的可能性提供依据。 相似文献
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食管贲门癌切除术黏膜层单层吻合法疗效分析 总被引:4,自引:0,他引:4
目的探讨食管、胃及空肠黏膜单层吻合法预防吻合口瘘、吻合口狭窄及返流性食管炎的效果.方法 1996年3月~2002年8月手术治疗食管癌235例,贲门癌195例,采用食管-胃及空肠黏膜延长、黏膜单层缝合法.结果术后10 d X线吞钡照片示钡剂通过顺畅,吻合口直径1.5~2 cm.术后随访1年,吞咽顺利,未见吻合口狭窄.结论该术式吻合口径宽,对预防吻合口瘘、狭窄及返流性食管炎效果显著,是食管及胃肠吻合较为理想的方法. 相似文献
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目的:探讨子宫颈残喘癌的预防和治疗。方法:1986年5月到1992年7月,我院共收治经病理证实的子宫颈残端癌12例。所有病人均在外院接受过子宫次全切除术。Ⅰ期2例,Ⅱ期4例,Ⅲ期6例。根据期别、组织学类型、解剖特点,治疗采用单纯手术,手术加放疗;单纯放疗、体外加后装腔内放疗;放疗加化疗。结果:全组7例存活,存活率58.3%,5例死亡中4例死于肿瘤,1例第8年死于其它疾病。结论:子宫颈残端癌预防的关键在于子宫次全切除前宫颈细胞学或病理证实无病变,术后严密随诊。治疗方法主要是放射治疗,部分全盆大野,盆腔四野加个体化后装腔内治疗。 相似文献
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少见部位骨巨细胞瘤的X线影像分析 总被引:6,自引:0,他引:6
目的统计分析一组少见部位骨巨细胞瘤的X线影像表现,对易与之混淆的4种骨病提出鉴别诊断,以加深认识。方法搜集经手术、病理证实的少见部位骨巨细胞瘤48例X线平片、CT和动脉造影片资料进行回顾性分析。结果表现为囊状膨胀性骨质破坏30例,且内多有肥皂泡沫状表现;溶骨性骨质破坏10例;骨外有软组织肿块,骨塌陷变扁伴局部膨出4例;侵犯邻骨4例;骨质增生硬化3例;异常血管及“肿瘤染色”3例。结论X线平片对少见部位骨巨细胞瘤诊断具有重要价值,CT优于平片,动脉造影有助于诊断与制定治疗方案。 相似文献
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Assessment of prognostic significance of interleukine-8 (L-8) urine levels was made in 12 patients with verified surface cancer of the urinary bladder (SCUB) on adjuvant intravesical immunotherapy. Quantitative enzyme immunoassay identified IL-8 in the urine before intravesical injection of BCG vaccine and 6 hours later. A total of 192 urine samples were studied ("Multiskan-Jems", 405 nm). Adjuvant immunotherapy raises an L-8 level in the urine of the patients. After 8-week immunotherapy IL-8 elevated from 169.4 pg/ml to 326 pg/ml. Four patients with minimal difference in IL-8 urine levels (120 pg/ml, on the average) before and 6 hours after intravesical injection of BCG vaccine developed recurrence. Thus, quantitative assessment of IL-8 in urine of SCUB patients given intravesical BCG therapy can serve as one of prognostic criteria of adjuvant immunotherapy efficacy. 相似文献
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The study was concerned with objective criteria for identification of actual carcinogenic hazards. It used quantitative analysis data on morphologic structures of tumors induced in 12565 albino noninbred rats in the course of carcinogenicity evaluation of 112 chemical agents. The totality of all the data were analyzed versus morphologic parameters of tumors and carcinogenicity of the agents. Spontaneous tumors turned to be the cause of death in animals treated with noncarcinogenic or slightly carcinogenic agents whereas a completely different spectrum of tumors were responsible for lethality in those receiving potent carcinogens. It was inferred that increased incidence of spontaneous tumors following treatment with maximum tolerable doses can not be used as a criterion of actual blastogenicity of an agent. 相似文献
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Biswa Mohan Biswal Chandra Sekhar Bal Manavjit Singh Sandhu Ajit Kumar Padhy Goura Kishore Rath 《Journal of neuro-oncology》1994,22(1):77-81
Summary Brain metastases in differentiated carinoma of the thyroid is a rare occurrence. We treated five documented cases of carcinoma of thyroid with brain metastases out of 400 cases of thyroid cancer treated between 1972 to 1993. 4 were females out of which one was pregnant during the appearance of brain metastases. All cases were treated with thyroidectomy, and radioiodine as primary therapy. Brain metastases developed 6 months to 11 years following treatment of the primary and were treated with radiotherapy and suppressive levothyroxine. We observed the beneficial effect of suppressive thyroxine and the poor prognosis associated with pregnancy and withdrawl of thyroid replacement therapy. 3 of the 5 patients are alive 12–23 months after treatment for brain metastases, while 2 patients died at 4 months and 7 years post brain metastases due to pulmonary and hepatic failure, respectively. 相似文献
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All 269 patients underwent surgery as pancreatic cancer in our institute from 1965 to 1985. Resectability rate was 20.3% (32/158) in the head, 20.7% (19/92) in the body and tail and 0% in the combined lesion. Pancreaticoduodenectomy (PD) was performed for the head in 30 patients. Distal pancreatectomy was performed for the body and tail in 16 patients. There were three postoperative deaths in the case which underwent the resection. Operative survival rate in the head was 43.9% at the first year and 27.4% at the 5 th year. Two patients survived more than five years after PD. On the other hand, survival rate in the body and tail was 40% at the first year and 26.4% at the 5 th year. Only one patient is alive 5 years 10 months after distal pancreatectomy. 相似文献