City of Hope Cancer Center Chicago, formerly Cancer Treatment Centers of America (CTCA), is dedicated to providing comprehensive cancer care tailored to you and your specific cancer. Our cancer doctors offer a level of expertise that comes from working with patients every day to deliver personalized medicine using today's scientific advances. We treat patients with all types and stages of cancer at any point in their journey. Cancer treatment is our specialty. Located midway between Chicago and Milwaukee in Zion, Illinois, our hospital focuses on accelerating speed to specialized care, with world-class hematology oncology and highly trained expert oncologists. Appointments may be available in as few as 24 hours, with same-day diagnostics.