Severe oral mucositis is a condition in which the sensitive cells lining the mouth and throat are damaged by cancer treatments such as chemotherapy (with or without radiation) and become painful mouth sores. Kepivance™ is a recombinant (genetically engineered) form of human keratinocyte growth factor (KGF), a protein that is naturally produced by the body. Kepivance™ reduces the incidence and duration of or severe oral mucositis by helping protect existing cells that line the mouth and throat from the damage caused by chemotherapy and radiation, and by stimulating the growth and development of new cells.