Ductal cancer in situ is an earlier and more easily treated stage of cancer than invasive cancer. Cancer is called invasive when cancer cells have grown beyond the duct and spread to surrounding breast tissue, and perhaps, into lymph nodes under the arm or other parts of your body.

Invasive cancer is treated differently than ductal cancer in situ. To learn more about treatment options for invasive cancer, go back to the lighthouse and select the "Invasive Cancer" (Cancer That Has Spread) information.

The lump in your breast is treated.