This is a report on the contribution and characteristic of MG, antigen recognized by gastric cancer monoclonal antibody with immunohistochemical staining in gastric cancer, and its vicinal and distant tissues. There is a positive rate of 84% (42/50) in gastric cancer, and 32% (16/50) in the epithelia adjacent to the cancer, where existed 56% of dysplasia and 40% of metaplasia, and no reaction in the tissues without dysplasia or metaplasia. But there was 4% of weak positive staining in normal tissues that were more than 5 cm beyond the. cancer. We conclude that tumor-associated antigen MG, is a useful marker for diagnosis of gastric cancer and detection of precancerous condition.

This paper is a pathological study in which collected 146 debatable biopsies of gastric mucosa that had been diagnosed as hyperplasia, dysplasia and carcinoma microscopically. All these cases were diagnosed as hypcrplasia and dysplasia according to the Nagayo's and Ming's standards. According to the author's revised standard, all these cases should be diagnosed as gastric carcinoma. Gastrectomy were performed recently on the above cases and the pathological diagnosis were 29 gastric carcinoma in early stage, the other 117 were in middle or late. This paper indicated that a little cytoplasm, multiform nucleus, the ceils arrangment loss of polarity, vary sized atypical glandular tubules, irregular arrangment, incompleteness appeared in half or partial gland, dysplasia epithelia budding and brandling, common wall of glands, network structure, cysts formed by one or two or more dysplasia epithelia, the nucleus squeeze to side single cell in cyst wall, variant newborn dysplasia glands etc., all of these manifestation are the Iession of carcinoma. The dysplasia should only be limited to the epithelia or glands with complete base, membrane. The dysplasia epithelia and glandular structure which located in intestitial substance are considered to be infiltrate carcinoma other than dysplasia.

25～≤30 years was alive. Conclusion The survival rate of patients with early gastric carcinoma is high after surgery.

Objective To investigate the effect of electrovaporization on prostatic tissue structure in vivo. Methods 26 cases of benign prostatic hyperplasia underwent electrovaporization of prostatic tissue,the surface area of the vaporized prostatic tissue and the depth at the central area being observed with light microscope and electron microscope. Results The vaporizing effect on tissue with pure cut current were stronger than that with pure coagulative current, the greater the output power the stronger the vaporizing effect.6 millimeter under the vaporized surface caused by pure coagulative current still revealed some histological alterations of injury,while these histological alterations in pure cut current electrovaporization was less. Conclusions These findings may have implications that in transurethral electrovaporization of prostate,injury to the adjacent or deep tissues should be avoided as much as possible.