Hard-to-spot breast cancer now makes up more than 1 in 10 cases in US, report finds

A fast-rising form of breast cancer that's harder to detect on mammograms now makes up more than one in ten cases in the United States, according to a new report from the American Cancer Society (ACS). Invasive lobular carcinoma, the second most common breast cancer type, is increasing about 3% each year, more than triple the rate of other breast cancers, the report, published on Tuesday morning, found. About 80% of breast cancers are the invasive ductal type, which occurs when cancer cells grow in the milk ducts and invade the surrounding breast tissue. However, incidence of invasive lobular carcinoma, a cancer than develops in the milk-producing glands of the breast -- once rare -- has doubled since the 1970s. Lobular breast cancer hasn't drawn much attention partly because many people v