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目的:探讨糖尿病对乳腺癌根治术后患者调强放疗早期不良反应发生的影响。方法:回顾性分析2014年10月至2020年12月南京鼓楼医院集团宿迁医院乳腺癌根治术后行调强放疗的102例乳腺癌患者的临床资料，其中糖尿病组32例，非糖尿病组70例。比较两组调强放疗早期不良反应的发生情况，并分析放疗前血糖水平对调强放疗早期不良反应及对调强放疗前后淋巴细胞计数的影响。结果:糖尿病组发生1、2级急性放射性肺炎分别为9例（28.1%）和1例（3.1%），非糖尿病组分别为6例（8.6%）和1例（1.4%），两组差异有统计学意义（n χ2=7.22，n P=0.027）。糖尿病组发生1~3级急性放射性皮炎分别为16例（50.0%）、13例（43.8%）、3例（6.2%），非糖尿病组分别为53例（75.7%）、15例（21.4%）、2例（2.9%），两组差异有统计学意义（n χ2=6.99，n P=0.030）。根据放疗前果糖胺水平将合并糖尿病患者分为血糖控制尚可组（果糖胺≤2.5 mmol/L）和血糖控制不良组（果糖胺>2.5 mmol/L），两组急性放射性皮炎发生情况差异有统计学意义（n P=0.039）。血糖控制尚可组和血糖控制不良组放疗前淋巴细胞计数差异无统计学意义（n P>0.05）；放疗后两组淋巴细胞计数均较放疗前降低，其中血糖控制不良组降低更明显，差异有统计学意义（n P=0.021）。n 结论:合并糖尿病的乳腺癌根治术后患者急性放射性肺炎及急性放射性皮炎发生率较高，血糖控制不良的患者更易发生急性放射性皮炎。“,”Objective:To investigate the effect of diabetes on the occurrence of early adverse reactions of intensity-modulated radiotherapy in patients after radical mastectomy for breast cancer.Methods:The clinical data of 102 breast cancer patients who underwent intensity-modulated radiotherapy after radical mastectomy for breast cancer in Nanjing Drum Tower Hospital Group Suqian Hospital from October 2014 to December 2020 were retrospectively analyzed, including 32 cases in the diabetes group and 70 cases in the non-diabetes group. The incidence of early adverse reactions of intensity-modulated radiotherapy in the two groups was compared, the effects of blood glucose before radiotherapy on the early adverse reactions of intensity-modulated radiotherapy and the lymphocyte count before and after intensity-modulated radiotherapy were analyzed.Results:There were 9 cases (28.1%) and 1 case (3.1%) of grade 1 and 2 acute radiation pneumonitis in the diabetes group, and 6 cases (8.6%) and 1 case (1.4%) in the non-diabetes group, respectively, and there was a statistical difference between the two groups (n χ2 = 7.22, n P = 0.027). Grade 1-3 acute radiation dermatitis occurred in 16 cases (50.0%), 13 cases (43.8%) and 3 cases (6.2%) in the diabetes group, and 53 cases (75.7%), 15 cases (21.4%) and 2 cases (2.9%) in the non-diabetes group, respectively, and the difference between the two groups was statistically significant (n χ2 = 6.99, n P = 0.030). According to the level of fructosamine before radiotherapy, the patients with diabetes were divided into normal blood glucose control group (fructosamine ≤2.5 mmol/L) and poor blood glucose control group (fructosamine >2.5 mmol/L), and there was statistical difference in the morbidity of acute radiation dermatitis between the two groups ( n P = 0.039). Before radiotherapy, there was no significant difference in lymphocyte count between the normal and poor blood glucose control groups (n P > 0.05). After radiotherapy, the lymphocyte count in both groups was significantly lower than that before radiotherapy, and the decrease was more obvious in the poor blood glucose control group, the difference was statistically significant ( n P = 0.021).n Conclusions:The postoperative patients with breast cancer complicated with diabetes have a high incidence of acute radiation pneumonia and acute radiation dermatitis. Patients with poor blood glucose control are more likely to have acute radiation dermatitis.