ABSTRACT
Objective To analysis the correlation factors which influence the prognosis and relationship of molecular subtypes on young patients.Methods Clinical data of 108 cases young breast cancer patients (≤ 35 years old) who were treat in the Third Affiliated Hospital of Zhengzhou University from January 2007 to October 2014 were retrospective analyzed.According to immunohistochemistry such as estrogen receptor (ER),progesterone receptor(PR),human epidermal growth factor receptor-2 (Her-2/neu),Ki-67 index,patients were divided into molecular subtypes and follow up.Results LuminalA subtype,LuminalB subtype,human epidermal growth factor receptor-2 overexpression subtype and basal-like accounted for 22％ (24/108),33％ (36/108),20％ (21/108) and 25％ (27/108) respectively,and there's 5-year disease-free survival rate were74.1％,62.8％,.56.8％,58.5％ respectively.Kaplan-Meier method was used to draw the disease-free survival curves through.There was no significant difference in the 5-year disease-free survival rate of each subtype (x2 =0.318,0.802,0.876,0.277,0.239,0.074,P＞0.05).Univariate analysis of prognostic factors of Log-rank showed that there were significant differences between recurrence with tumor size,age,lymph node metastasis and surgical methods in young patients with breast cancer(x2 =9.612,12.099,51.345,5.928,P＞0.05),while no significant difference with adjuvant chemotherapy,radiotherapy,endocrine therapy and molecular typing(x2 =2.381,1.958,0.027,2.612,P＞0.05).Multivariate Cox proportional hazards regression model analysis showed that tumor size (RR =5.487,95％ CI 1.519-19.822,P =0.009) and lymph node metastasis (RR =5.655,95％ CI 2.939 -10.884,P＜0.001) were independent risk factors for disease recurrence.Conclusion Tumor size and lymph node metastasis are important factors of prognosis on young patients.Young patients need the screening and therapy in the early time.