Objective To observe the radioprotective effect of low dose mitomycin C(MMC) on chest carcinoma. Methods 100 cases of chest carcinomas confirmed by histologic or cytologic diagnosis, including, esophageal carcinoma 54 cases, lung cancer 46 cases, were randomized into study group and control group, 50 cases in each group. The study group was treated with low dose MMC (0.002 mg/kg iv one time per week, about 5 ~ 7 times in the course) during routine radiotherapy, the control group was treated with routine radiotherapy only. Results All of 100 cases completed the treatment. Acute radiation- induced esophagitis of study group and control group was 30 % and 48 % respectively (?2=3.897,P =0.048). Acute radiation- induced pneumonia of study group and control group was 4 % and 16 % respectively (?2 =4.001,P =0.045). Hematologic toxicity of study group and control group was 50 % and 48 % respectively (?2=0.208, P =0.648). Response rate of study group (84 %) was obviously higher than that of control group (68 %) (?2 =4.089, P =0.043). Conclusions Low dose MMC combining with chest carcinoma's radiotherapy can obviously reduce acute radiation- induced esophagitis and pneumonia, without obvious hematologic toxicity, meanwhile increase radiation effect.

0.05). The corresponding 1-, 2- and 3-year loca l r ecurrence rates were 4.4%, 8.9%, 13.3% and 9.8%, 26.8%, 32.6% (P 0.05). Conclusions Simultaneous small-field boosting radiotherapy can obviously reduce t he local recurrence and improve the survival without causing more toxicities in the treatment of soft tissue sarcoma in extremities.

Objective:To evaluate and compare the inpatient medical services of secondary public and private general hospitals by using disease risk adjustment model, and to explore the application of disease risk adjustment model in medical service evaluation of different ownership hospitals.Methods:Based on 1 032 865 front pages of medical records in Chengdu in 2017 and 2018, a regression model with mortality, average length of stay, total hospitalization expenses, medical service fees, drug costs and surgical consumables costs as dependent variables and related influencing factors as independent variables was established by using disease management intelligent analytic and evaluation system. The risk adjusted case mix index(ACMI) was calculated. The mortality, average length of stay, hospitalization expenses and other indicators were predicted. The ratio of observed value to expected value(O/E value) of each index in public and private secondary general hospitals was obtained and compared.Results:The ACMI value of secondary public general hospital was 4.63, slightly higher than that of private hospitals(4.55). The technical difficulty and resource consumption of the public hospitals were slightly higher than that of the private hospitals.From the O/E value, the management of disease mortality, medical service fees and inpatient drug costs of secondary public hospitals was generally good, and the O/E values of hospitalization expenses of each secondary private general hospital were quite different, and there was a possibility that the costs were unreasonable. The O/E value of surgical consumables cost in secondary public general hospital was 1.54, and there was room for improvement in cost management.Conclusions:The disease risk adjustment model fully considers the characteristics of different types and severity of diseases in different institutions, which can not be simply compared. Based on individual cases, it realizes the comparability of different ownership hospitals, and provides a new means for the evaluation of medical service ability and quality.