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find Keyword "癌前病变" 12 results
  • SIGNIFICANCE OF THE CHANGES OF DNA CONTENT, ULTRASTRUCTURE AND TUMOR-RELATED ANTIGNES EXPRESSION IN ATYPICAL HYPERPLASIA OF BREAST

    The DNA content, cellular ultrastructure and the expression of blood group Y antigen and immunosuppressive acidic protein-2(IAP-2) were observed in normal breast, cystic hyperplasia of breast and breast cancer. The results showed: the results observed in the cells of cystic hyperplasia with epithelial proliferation grade Ⅰ were similar to those in normal breast cells. The DNA content increased, the hypoplasia and dedifferentiation features in some structures of cellular membrane and nucleus were observed, and the abnormal antigens expressed in part of the atypical hyperplasic cells. The DNA content and ultrastructure in a part of cells with aypical hyperplasia grade Ⅲ were similar to those in the cells of breast cancer grade Ⅰ. The results indicated that in the couse of atypical hyperplasia, the biological abnormalities and its extent of those cells were closely related to the differentiation extent, the developing tendency and the risk of canceration of the cystic hyperplasia of breast.

    Release date:2016-08-29 03:18 Export PDF Favorites Scan
  • Diagnostic Accuracy of Liquid-Based Cytology versus Conventional Cytology for Cervical Neoplasia: A Systematic Review of Randomized Controlled Trials

    Objective To evaluate the diagnostic accuracy of liquid-based cytology versus conventional cytology for cervical neoplasia. Methods Such databases as PubMed, Embase, The Cochrane Library, Cochrane Central Register of Controlled Trials, CNKI and CBM were searched to collect the random control trials (RCTs) about evaluating the diagnostic accuracy of liquid-based cytology versus conventional cytology for cervical neoplasia published before June, 2010. According to the inclusive and exclusive criteria, two assessors independently screened the studies, extracted the data, assessed the quality and conducted meta-analysis by using RevMan 5.0 and Metadisc 1.4 softwares. Results A total of five RCTS were eligible. With the ASCUS regarded as the abnormal critical value, there were significant differences between liquid-based cytology and conventional cytology in specificity for CIN 3+ (RR=0.97, 95%CI 0.97 to 0.97, Plt;0.000 01) and CIN 2+ of high risk population (RR=1.01, 95%CI 1.01 to 1.01, Plt;0.000 01), but no significant differences were found in other outcomes. Conclusion Based on the current evidence of evidence-based medicine, the liquid-based cytology is of neither more specificity nor more sensitivity for detecting high grade CIN than the convention cytology in the regular screening program, but it seems to be of more specificity in high risk group.

    Release date:2016-09-07 11:01 Export PDF Favorites Scan
  • Diagnostic Accuracy of Human Papillomavirus Test for Cervical Neoplasia: A Systematic Review of Randomized Controlled Trials

    Objective To evaluate the diagnostic accuracy of human papillomavirus test for cervical neoplasia. Methods The Cochrane Library (Issue 2, 2010), Cochrane Central Register of Controlled Trials (Issue 2, 2010), and the following databases as CBMdisc, CNKI, MEDLINE, PubMed, and EMbase were all searched from their establishment to June 2010 to get all the randomized control trials (RCTs), and the relevant magazines and the references of the included studies were also searched. The screening, data extraction and quality assessment were conducted in accordance with the inclusion and exclusion criteria by two reviewers independently. The software Metadisc 1.4 was used to perform meta-analyses, and the forest plots and SROC curves were drewn with the RevMan 5.0 software. Results A total of 7 RCTs involving 171 604 subjects were included. The meta-analyses showed, the sensitivity of the HPV test for detecting cervical neoplasia (CIN) was higher than that of the conventional cytology test; the difference in sensitivity for detecting CIN in or above second grade was only found between the test of HPV combined with cervical cytology and the test of conventional cytology (Plt;0.00001), but the HPV test obviously lowered its diagnostic specificity. Among the following three tests for diagnosing CIN, such as, the single test of HPV, the combined test of HPV and cervical cytology, and the test of HPV followed by cytology shunting, the statistic differences compared with the conventional cytology test were found (Plt;0.01) except the last test (P=0.41) which had no difference in diagnosing CIN in or above the first grade. Conclusion The current evidence indicates that, compared with the conventional cytology test, the HPV combined with the cytology test can improve the sensitivity for diagnosing CIN in or above the second grade, but the HPV test cannot improve the specificity for cervical neoplasia. The application of human papillomavirus test for detecting cervical neoplasia needs to be further studied.

    Release date:2016-09-07 11:06 Export PDF Favorites Scan
  • Opportunistic Screening for Cervical Cancer in Guizhou Province

    目的 探讨贵州地区进行宫颈癌机会性筛查的价值。 方法 回顾性分析2010年11月-2011年10月贵州省人民医院妇科门诊及住院进行宫颈癌机会性筛查的1 842例患者资料,筛查方法包括液基细胞学技术、宫颈刮片、人乳头瘤病毒(HPV)分型检测、HPV第2代捕获杂交法检测、阴道镜检查,以病理确诊宫颈癌前病变及宫颈癌。 结果 贵州地区女性人群的HPV平均感染率为21.87%。共检出宫颈癌前病变39例(2.12%),宫颈癌2例(0.11%)。 结论 医院内就诊女性宫颈病变检出率高,应高度重视其机会性筛查,有助于早期干预治疗。

    Release date:2016-09-08 09:17 Export PDF Favorites Scan
  • IL-1β Induces Expression of Intestinal Specific Markers in Cultured Human Gastric Epithelial Cells GES-1

    Objective To observed the effect of IL-1β on expression of caudal-related homeobox gene 1 (CDX1) mRNA and mucoprotein 2 (MUC2) mRNA in cultured human gastric epithelial cells GES-1, and to investigate the underlying signal transduction pathways. Methods ①GES-1 cell was activated with IL-1β of different concentrations and time, the expression levels of CDX1 mRNA and MUC2 mRNA were detected by using real-time PCR. ②GES-1 cell was pretreated with PDTC, a NF-κB inhibitor, for 1 h prior to the addition of IL-1β, then the expressions of CDX1 mRNA and MUC2 mRNA were measured. Results Both CDX1 mRNA and MUC2 mRNA were not examined in GES-1 cell under normal culture conditions. But they could be induced by IL-1β with a dose-dependent manner in a concentration range (P<0.05); 8 h after treatment with IL-1β, the peak values of the expression levels of CDX1 mRNA and MUC2 mRNA were reached (P<0.05), then declined gradually. When pre-incubated with NF-κB inhibitor PDTC, the expression levels of CDX1 mRNA and MUC2 mRNA were significantly decreased (P<0.05). Conclusion IL-1β significantly induces the expressions of CDX1 mRNA and MUC2 mRNA in cultured human gastric epithelial cell GES-1 through the NF-κB signal pathway, which indicates that IL-1β plays a role in the process of intestinal metaplasia.

    Release date:2016-09-08 10:58 Export PDF Favorites Scan
  • THE CLINICAL SIGNIFICANCE OF TELOMERASE ACTIVITY IN LIVER CANCER AND PRE-CANCEROUS LESION

    Objective To investigate the variety of telomerase activity in the course of liver cancer development, and the possibility of using telomerase as a marker of HCC. Methods Human liver specimens, comprising 22 HCC and adjacent peritumoral tissues, 12 liver cirrhosistissues, 6 nodulat regenerative hyperplasia (NRH) tissues and 10 normal liver tissues, were examined for telomerase activity by TRAP assay based on PCR. Results Twenty of 22 HCC and 14 of 22 adjacent tissue specimens were positive for telomerase activity with a positive rate of 90.9% and 63.6% respectively. Ten of 12 liver cirrhosis tissues were positive with a positive rate of 83.3%. 5 of 6 NRH were positive with a positive rate of 83.3%. Telomerase activity was negative in 10 normal liver tissues. Conclusion Telomerase may occur in the progress of hepatocarcinogenesis. Telomerase can be used as a tumor marker of HCC.

    Release date:2016-09-08 02:00 Export PDF Favorites Scan
  • 早期食管癌及癌前病变的内镜诊治研究进展

    食管癌是世界上第6大最常见的癌症相关死亡的原因,全世界大约有一半的早期食管癌患者发生于中国。多数患者在发现时已进入中晚期,且远期预后较差,因而食管癌的早期诊断和治疗十分重要。近年来消化内镜诊疗技术的飞速发展使越来越多的食管癌患者能被早期诊断和治疗,使患者生存率和生活质量大大提高。现就早期食管癌及癌前病变的内镜诊断及治疗研究进展作一综述。

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  • Recent Research Progress and Development Direction of Autofluorescence Diagnosis Technology

    Autofluorescence has great advantage on detecting premalignant lesions and early cancers which are not detectable by conventional white light endoscopy (WLE). In this review, the recent advances in autofluorescence for diagnosis of precancerous lesions and early cancers are presented. Varieties of endogenous fluorophores in biological tissues, the potential mechanisms of the autofluorescence differences between normal and abnormal tissues, the selection of light source and optimal excitation wavelengths, and effective algorithms for processing autofluorescence data are highlighted. Finally, the shortages and improvement directions of autofluorescence technique for the diagnosis of precancerous lesions and early cancers are briefly discussed.

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  • 多环黏膜切除术治疗早期食管癌及癌前病变疗效分析

    目的探讨多环黏膜切除术治疗早期食管癌及癌前病变的临床疗效。 方法2011年9月至2012年12月四川大学华西医院消化内科收治早期食管癌及癌前病变患者共47例,其中男26例、女21例,年龄58.80岁。所有患者均行内镜下多环黏膜切除术治疗。 结果全组手术均成功,平均手术时间25.4 min,病灶平均直径2.4 cm。所有病变均一次性彻底切除,术中及术后无出血病例。术后1例患者出现气胸,保守治疗后痊愈。术后随访47例,随访时间12~26(18.0±2.4)月,全组均无复发。2例患者出现食管狭窄,其中1例行内镜下食管水囊扩张术后吞咽困难明显缓解。 结论多环黏膜切除术治疗早期食管癌及癌前病变快速、操作简单,短期疗效较好,但对于直径>3 cm的病变存在术后食管狭窄的风险,仍需谨慎选择。

    Release date:2016-10-02 04:56 Export PDF Favorites Scan
  • Database research part Ⅴ: tumor characteristics of colorectal cancer

    ObjectiveTo analyze the tumor characteristics of colorectal cancer in the current version of Database from Colorectal Cancer (DACCA).MethodsThe DACCA version was the updated version on September 26, 2019. The data items included: date of surgery, precancerous lesions, cancer family, tumor site, distance to the dentate line, morphology of tumor, size, position, happening and origination, differentiation, pathology of tumor, Ki-67 of protein, complications (included obstruction, intussusception, perforation, pain, edema, and hemorrhage) were analyzed for the characteristics of each selected data item.ResultsA total of 11 898 analyzable data rows were obtained by screening the DACCA database. Among the 11 898 pieces of data, the effective data of precancerous lesions was 1 275, including 541 (42.4%) with precancerous lesions, and 734 (57.6%) without precancerous lesions. There were 1 116 valid data on cancer families, and 761 (6.4%) had a family history of cancer. The Ki-67 index had a total of 1 893 valid data, which ranged form 0 to 95% [(59.0±20.1) %]. According to the classification of tumor occurrence, the primary colorectal cancer accounted for the vast majority (92.8%), and the metastatic colorectal cancer was the least (0.3%). According to the primary and multiple primary, respectively analysis of tumor site, distance to the dentate line, morphology of tumor, size, position, differentiation, and pathology of tumor showed that, most tumor’s position were in the rectum (76.9%, 41.9%), the most common morphology was ulcers (42.4%, 51.5%), the most tumors were located around the wall of intestine (44.6%, 35.0%), the degree of differentiation was mostly moderate (65.4%, 61.3%), most of the tumor pathologies were adenocarcinoma (77.8%, 64.0%).ConclusionA more accurate and detailed analysis of colorectal cancer tumor characteristics by the DACCA database is helpful for determining the diagnosis and treatment plan in clinical work, judging the prognosis, and so on.

    Release date:2020-02-28 02:21 Export PDF Favorites Scan
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