Comprehensive Oncologists

Dr. Hussein has a degree in medicine from American University of Beirut and a master’s degree in medical management from Tulane University. He is board certified in internal medicine, medical oncology and hematology.

Previous positions include Assistant Professor in Hematology/Oncology at the University of Miami and Duke University Medical Center; Director of Clinical Research in South Florida for Response Oncology; and Deputy Director of Cancer Research for Columbia South Florida. He was also the principal investigator on trials through the Mount Sinai Community Clinical Oncology Program for four years. He has received grants and awards for his research in ovarian cancer and chemotherapy-induced alopecia.

Dr. Hussein is the chairman of Memorial Healthcare System’s ethics committee and a member of the chemotherapy safety committee and hematology/oncology peer review committee. He is also active in the community as a board member of the Broward Chapter of the American Cancer Society, and as a member of the Healthcare Council of Gilda’s Club South Florida.

Dr. Abraham graduated from Kottayam Medical College at the University of Kerala in India. She then relocated to New York to become an intern, resident and hematology fellow at Interfaith Medical Center and a hematology/oncology fellow at Long Island Jewish Medical Center and Cabrini Medical Center.

Before coming to Memorial Cancer Institute, Dr. Abraham was an assistant professor of medicine at New York Medical College and an attending physician at Metropolitan Hospital Center, New York. While at Metropolitan Hospital Center, she served on the cancer committee and was recognized by the department of oncology for her clinical and academic excellence.

She is board certified in hematology, oncology and internal medicine.

Dr. Greenhawt attended medical school at Jefferson Medical College in Philadelphia and completed his internship, residency and oncology fellowship at the University of Miami Affiliated hospitals in Miami, Florida. He is board certified in internal medicine and oncology and a member of many professional organizations including the Florida Medical Association, the American College of Physicians, Broward County Medical Association, the American Society of Clincial Oncology, and the Florida Society of Clinical Oncology.

Dr. Greenhawt has been in practice in the Miami Dade and Broward areas for 33 years and has been on staff at Memorial for 30 years.

Dr. Wittlin attended medical school at St. Louis University School of Medicine in St. Louis, Missouri, completing his residency at Jackson Memorial Hospital, University of Miami, and his fellowship at Northwestern University Medical Center in Chicago. He is board certified in internal medicine and oncology.

Dr. Wittlin has served as a member of the Memorial Cancer Committee, Institutional Review Board and chairman of the Memorial Tumor Board. He has published on lung cancer, breast cancer, bone marrow transplant and other hematological malignancies.

Dr. Hirsch attended medical school in New York and completed his internship, residency and fellowship at the University of Miami Affiliated Hospital in Miami, Florida. He is board certified in internal medicine, oncology and hematology and is a member of the American College of Surgeons, the American Society of Clinical Oncologists, the American Medical Association, the Florida Medical Association, the Dade County Medical Association, the Florida Society of Oncology, and the American Society of Hematology.

Dr. Hirsch has published research on lung cancer and is an advocate of clinical research, having been principal investigator for many oncology trials.

Dr. Martinez-Rio attended medicine school at the University of Illinois College of Medicine in Champaign-Urbana, he completed his internship, residency and fellowship at Lenox Hill Hospital in New York. He is board certified in internal medicine and oncology. Dr. Martinez-Rio is a member of the American Medical Association, Broward County Medical Association, the American Society of Clinical Oncology, and the American Society of Hematology.

Dr. Martinez-Rio is active in clinical research, acting as a principal investigator for a number of oncology trials. He is fluently bilingual in both English and Spanish.