Aaron Pelletier, MD | Plastic & Reconstructive Surgeon

Barbara Buttin, M.D. is a gynecologic oncologist at City of Hope Cancer Center Chicago (formerly Cancer Treatment Centers of America [CTCA]). She is dedicated to caring for patients with gynecologic malignancies, including ovarian, cervical, uterine, vaginal and vulvar. Patient-focused care is an integral part of improving health outcomes, that's why Dr. Buttin centers her treatment on the individualized needs of the whole patient. She treats all gynecologic cancers using numerous therapies, including chemotherapy, radiation and surgery. Dr. Buttin also incorporates evidence-informed supportive therapies to help combat cancer-related side effects.

Evan Pisick, M.D., is a medical oncologist at City of Hope Cancer Center Chicago (formerly Cancer Treatment Centers of America [CTCA]). He is board certified in medical oncology and hematology. He believes it's important for cancer patients and their loved ones to learn as much as they can about the disease. Dr. Pisick talks with his patients about their diagnosis and treatment and encourages them to ask questions. Dr. Pisick has researched and written extensively on small cell and non-small lung cancer, as well as malignant mesothelioma.

Ajaz M. Khan, M.D. is a medical oncologist at City of Hope Chicago (formerly Cancer Treatment Centers of America [CTCA]). In his leadership role as Chief of Medical Oncology, Dr. Khan is responsible for guiding protocols, ensuring standard-of-care guidelines are consistently met and exceeded, and helping recruit high-quality physicians to City of Hope. In 2025, he was elected as the President of the Chicago Medical Staff. As an oncology doctor, Dr. Khan primarily focuses on treating patients with breast cancer, lung cancer, and gastrointestinal cancers. "My goal with my patients is to provide education, compassionate care and open lines of communication," says Dr. Khan.