Pathological examination is the basis for confirming the diagnosis of breast cancer, helping to choose the treatment plan and predict the outcome. So reading your pathological diagnosis report helps you fully understand your condition. Histological type Simply speaking, it can be divided into 2 major categories: non-invasive cancer and invasive cancer, non-invasive cancer is early stage and has better prognosis, while invasive cancer has worse prognosis. Histological grade represents the degree of tumor differentiation, the higher the grade, the worse the prognosis. Tumor size The larger the tumor, the worse the prognosis Lymph node status The more the number of metastases, the worse the prognosis ER/PR Hormone receptor status is one of the bases for choosing the treatment method. If the test result is positive, it means the tumor cells are sensitive to hormone and endocrine therapy can be used to suppress the hormone so as to obtain satisfactory results. HER-2 HER-2 status is an important indicator to assess the malignancy and prognosis of breast cancer. HER-2 positive patients have a poor prognosis and should receive HER-2 targeted therapy. Triple negative breast cancer i.e. ER/PR and HER-2 are negative and have a poor prognosis. TNM Staging of Breast Cancer Based on the pathology report, doctors can derive the staging of breast cancer in order to decide which treatment plan to adopt. t is the size of the tumor, n is the degree of lymph node metastasis, and m indicates where the tumor has spread to.