Invasive ductal carcinoma of the breast is the most common type.

Stage III invasive ductal carcinoma of the breast has a relatively low cure rate.

Stage III invasive ductal carcinoma of the breast usually indicates that the cancer cells are more malignant and more aggressive and metastatic. This means that the cancer cells are more likely to invade surrounding tissues and may metastasize to other parts of the body through the lymphatic or blood system. Also, because invasive breast cancer may be detected at an advanced stage, the tumor may already be large and there may be lymph node metastasis or distant metastasis. These advanced lesions increase the difficulty and complexity of treatment, thus reducing the cure rate. In addition, for patients with grade III invasive ductal carcinoma of the breast, surgery alone is often difficult to achieve a radical effect, so it will also lead to a lower cure rate.