The signs and symptoms that lead to suspicion of a malignant lesion of the breast are:

• Changes in breast shape or size.
• Feeling a lump on your breast or in the axillary lymph nodes.
• Pain, swelling, or redness on the skin of the breast.
• Discharge through the nipple.
• Thickening of the skin covering the breast and a corrugated texture to the skin.

Noticing a lump in your breast may be a symptom of breast cancer, though this does not mean that all lumps are cancerous. Some can be cysts of fat or fibrous tissue. If you detect a lump, it is important that you see a doctor as soon as possible for an examination.