IDC may cause a hard, immovable lump with irregular edges to form in your breast. It can sometimes be felt during a breast examination. In some cases, the cancer causes the nipple to become inverted. A mammogram may show areas of calcification -- where calcium has collected.
If your physical exam and mammogram indicate you may have IDC, you’ll have a biopsy to collect cells for analysis. Your doctor can make a diagnosis from the biopsy results.
Since IDC often spreads, you’ll likely have additional tests to look for cancer cells in other areas of your body. These tests may include: