Invasive triple-negative breast cancer with medullary features is a specific pathologic type of invasive breast cancer. It is defined as a certain subtype of medullary carcinoma, atypical medullary carcinoma, and non-specific type of invasive carcinoma. Invasive triple-negative breast cancer is characterized by medullary infiltrating carcinoma of the breast. Invasive breast cancer is a malignant tumor that develops mainly from carcinoma in situ. It is usually caused by the influence of the patient’s hormone levels, diet, and emotions. When patients are diagnosed, it is suggested that they should go to the doctor for comprehensive assessment and treatment in time, and they can choose to take surgery, chemotherapy, drugs, etc. The prognosis of invasive triple-negative breast cancer is not good, and it is suggested that they should pay attention to do the rechecking after the operation to prevent the spread of tumor cells. It is suggested that patients should go for regular checkups, develop good dietary habits, and take medication under doctor’s guidance, not without authorization, so as to avoid adverse consequences.