MSK Westchester offers residents of New York’s Hudson Valley and Connecticut the same expert cancer care they expect from MSK, just closer to home. Patients can receive much of their treatment — including chemotherapy, immunotherapy, and radiation — at our West Harrison, New York, location. Memorial Sloan Kettering Cancer Center — the world’s oldest and largest private cancer center — has devoted more than 130 years to exceptional patient care, innovative research, and outstanding educational programs. Today, we are one of 47 National Cancer Institute–designated Comprehensive Cancer Centers, with state-of-the-art science flourishing side by side with clinical studies and treatment.