Inflammatory breast cancer (IBC) is a rare but serious form of breast cancer. It accounts for only 1% to 3% of breast cancers (American Cancer Society 2015a). Inflammatory breast cancer causes the skin of the breast to feel warm and look red. It can also give the skin a thick, pitted appearance, similar to the peel of an orange. The breast itself may get bigger or feel itchy, tender, or hard. There may not be a single lump or tumor. In its early stages, inflammatory breast cancer is often mistaken for an infection rather than a cancer, and it may not be picked up by a mammogram.