As many as 25 percent of multiple myeloma patients also have amyloidosis, a condition that occurs when protein deposits accumulate in and cause damage to organs. Amyloidosis Support Groups is a source of knowledge, awareness, and support for the amyloidosis community. The organization has started dozens of amyloidosis support groups in the United States and around the world and also has an online discussion group and a toll-free helpline (1-866-404-7539).