A prospective study was done by the examination of nasopharyngoscope, reaction of EB virus's antigens and antibodies, nasopharyngofibroscope, pathological and EB virus's DNA, EBERs, etc. of about 100000 person...A prospective study was done by the examination of nasopharyngoscope, reaction of EB virus's antigens and antibodies, nasopharyngofibroscope, pathological and EB virus's DNA, EBERs, etc. of about 100000 persons in high risk area of NPC in Guangdong Province, China from 1986 to 1995. If any one of the following four conditions is present in some persons, i.e., (1) EBV VCA/IgA titer>1:80, (2) EBV EDAb>60%, (3) Dual or triple positiveness in VCA/IgA, EA/IgA and EDAb, (4) Any one of VCA/IgA, EA/IgA and EDAb keeps high titer or going up, they should be regarded as in precancerosis of NPC. The moderate or severe heteroplasia and heterometaplasia of nasopharyngeal mucosa are the precancerous lesions of NPC. Some individual who is in precancerosis or with precancerous lesion should be regarded as the high risk population of NPC. The results are of important scientific basis for screening and second degree prevention of NPC.展开更多
A study of precancerous gastric lesion was conducted in a randomly selected high risk population in Linqu, Shandong Province of China. 849 subjects aged from 30-64 were examined bioptically. There were 8 cases of gast...A study of precancerous gastric lesion was conducted in a randomly selected high risk population in Linqu, Shandong Province of China. 849 subjects aged from 30-64 were examined bioptically. There were 8 cases of gastric cancer, the prevalence rate was 0.9%. 169 subjects were diagnosed to be dysplasia, the prevalence rate of dysplasia was increased significantly with age. The regression equation was Y=0.47X-0.25. The prevalence of CAG was found in 36 per cent of the studied subjects and both dysplasia and CAG were more serious in the antrum than the. fundus. The results showed a natural history of precancerous gastric lesions in a high risk population in a high risk area.展开更多
objective: To explore the correlation between clinical stages of hepatocellular carcinoma (HCC) and disease-free survival,and the importance of screening in the high risk population of HCC. Methods: A ret rospective s...objective: To explore the correlation between clinical stages of hepatocellular carcinoma (HCC) and disease-free survival,and the importance of screening in the high risk population of HCC. Methods: A ret rospective survey of 1 725 cases with HCC after radical and relatively radical operation was performed. The follow-up rate was 84. 5%. The significant factors were analysed using Cox proportional hazards survival analysis model,and the disease-free survival was analysed using Kapalan-Meier estimination. Results: Uni variate analysis shows twelve prognostic clinicopathological factors. Multivariate analysis revealed 4 signifi cant prognostic factors: preoperative tumor number,tumor size,daughter nodules and vascular invasion. Ka palan-Meier estimination showed disease-free survival in subclinical stage was much better than in stage 2 or 3. Conclusion:Screening in the high risk population of HCC and having check-up of AFP and B ultrasono graphy of liver regularly themselvs can detect tumor of patients in early stage,so that they can have surgical treatment in subclinical stage,and have their disease-free survival time increased much more.展开更多
文摘A prospective study was done by the examination of nasopharyngoscope, reaction of EB virus's antigens and antibodies, nasopharyngofibroscope, pathological and EB virus's DNA, EBERs, etc. of about 100000 persons in high risk area of NPC in Guangdong Province, China from 1986 to 1995. If any one of the following four conditions is present in some persons, i.e., (1) EBV VCA/IgA titer>1:80, (2) EBV EDAb>60%, (3) Dual or triple positiveness in VCA/IgA, EA/IgA and EDAb, (4) Any one of VCA/IgA, EA/IgA and EDAb keeps high titer or going up, they should be regarded as in precancerosis of NPC. The moderate or severe heteroplasia and heterometaplasia of nasopharyngeal mucosa are the precancerous lesions of NPC. Some individual who is in precancerosis or with precancerous lesion should be regarded as the high risk population of NPC. The results are of important scientific basis for screening and second degree prevention of NPC.
文摘A study of precancerous gastric lesion was conducted in a randomly selected high risk population in Linqu, Shandong Province of China. 849 subjects aged from 30-64 were examined bioptically. There were 8 cases of gastric cancer, the prevalence rate was 0.9%. 169 subjects were diagnosed to be dysplasia, the prevalence rate of dysplasia was increased significantly with age. The regression equation was Y=0.47X-0.25. The prevalence of CAG was found in 36 per cent of the studied subjects and both dysplasia and CAG were more serious in the antrum than the. fundus. The results showed a natural history of precancerous gastric lesions in a high risk population in a high risk area.
文摘objective: To explore the correlation between clinical stages of hepatocellular carcinoma (HCC) and disease-free survival,and the importance of screening in the high risk population of HCC. Methods: A ret rospective survey of 1 725 cases with HCC after radical and relatively radical operation was performed. The follow-up rate was 84. 5%. The significant factors were analysed using Cox proportional hazards survival analysis model,and the disease-free survival was analysed using Kapalan-Meier estimination. Results: Uni variate analysis shows twelve prognostic clinicopathological factors. Multivariate analysis revealed 4 signifi cant prognostic factors: preoperative tumor number,tumor size,daughter nodules and vascular invasion. Ka palan-Meier estimination showed disease-free survival in subclinical stage was much better than in stage 2 or 3. Conclusion:Screening in the high risk population of HCC and having check-up of AFP and B ultrasono graphy of liver regularly themselvs can detect tumor of patients in early stage,so that they can have surgical treatment in subclinical stage,and have their disease-free survival time increased much more.
