1.Mucinous carcinoma of breast belongs to a special type of breast cancer, which is the type with good histological differentiation and good prognosis. 2.For mucinous carcinoma of breast with positive hormone receptor and no axillary lymph node metastasis, chemotherapy is not needed after surgery, and endocrine therapy is also an optional treatment, not necessarily needed. 3.For younger age, endocrine therapy is recommended. 4.Pregnancy is not allowed during endocrine treatment. 5.If you must have children, regenerate after 5 years of endocrine therapy.