Carcinoma of the breast, infiltrating lobular means: Infiltrating breast carcinoma is the second-most common form of invasive breast cancer. The glands responsible for secreting milk lobules are the first to be affected by lobular cancer. A mammogram can show a lobular cancer that looks similar to a tumor in the ducts. It appears as a large mass with small spikes radiating outwards from the edges of the spiculation. An infiltrating lobular cancer can lead to thickening and swelling of breast tissue. It is possible to develop lobular carcinoma in multiple breast locations or both. Radiation, chemotherapy and surgery are all options.
(in Medical Dictionary)