Cancer support United States. CanCare is a non-profit cancer support network with a mission to improve the quality of life for cancer survivors and their families in the United States. This support comes from trained volunteers who themselves have experienced and survived a cancer diagnosis or have been a caregiver to someone who has. CanCare volunteers know how to face and overcome many of the challenges presented by cancer. Their message of Hope, along with their own testimony of survival, provides strength and courage to those battling the disease. Cancer support Texas.