Invasive lobular carcinoma is a type of breast cancer that begins in the milk-producing glands (lobules) and then invades surrounding tissues. About 20,000 women are diagnosed with this type of breast cancer each year in the United States. Invasive lobular carcinoma makes up about 15 percent to 20 percent of all breast cancers.
Compared to the more common form of invasive breast cancer — invasive ductal carcinoma — invasive lobular carcinoma is less likely to show up on a mammogram. Although invasive lobular carcinoma tends to be larger at diagnosis, it generally has a more favorable outlook than does invasive ductal carcinoma.
Rather than forming a distinct lump you can feel, invasive lobular carcinoma (ILC) may simply feel like a thickened area in your breast. Lobular carcinoma cells tend to break out of the lobule in single file, then invade surrounding breast tissue in a web-like manner. The affected area may have a different textural feel from normal breast tissue, but it is unlikely to be a discrete mass.
As a result, an invasive lobular carcinoma might become fairly large — about 3/4 inch (2 centimeters) to about 2 inches (5 centimeters) or bigger — before any signs or symptoms appear. These might include: Continue reading Breast cancer – Invasive lobular carcinoma