Cancer Physicians and Surgeons
Hematology Oncology and Radiation Oncology Physicians
Michael DeLeo, MD, Medical Director of the BMC Cancer Center, is board certified in hematology oncology and internal medicine, specializing in hematology oncology. He provides comprehensive hematology oncology services. Dr. DeLeo received his medical degree from the University of Massachusetts Medical School, completed his residency training at Berkshire Medical Center, and was fellowship trained at Vanderbilt University Medical Center.
Nisar Ahmad, MD, a board certified and fellowship trained Hematologist Oncologist, Dr. Ahmad received his medical degree from King Edward Medical College in Pakistan and completed his residency in Internal Medicine at the Mt. Sinai/Bronx Veterans Affairs Residency Program. He is fellowship trained in Hematology Oncology at the University of Cincinnati.
Trevor Bayliss, MD, a cancer survivor himself, is board certified in internal medicine, specializing in hematology oncology. He provides comprehensive hematology oncology services. He received his medical degree from Albany Medical College and completed his residency in Internal Medicine at Dartmouth-Hitchcock Medical Center, where he was also fellowship trained in Hematology/Oncology.
Thomas Fynan, MD, a board certified and fellowship trained Medical Oncologist, providing comprehensive oncology care. He received his medical degree Rutgers-Robert Wood Johnson Medical School, and completed his residency in Internal Medicine at St. Vincent's Medical Center in New York, with a fellowship in Medical Oncology from Yale University School of Medicine.
Sean Mullally, MD, a fellowship trained hematology oncologist, board certified in hematology. Dr. Mullally provides comprehensive hematology oncology services and received his medical degree from Thomas Jefferson University in Philadelphia. He completed his residency at Baystate Medical Center, where he also served his fellowship in hematology oncology.
Wade Gebara, MD, a radiation oncologist for BMC since 2001, is board certified in radiation oncology. Dr. Gebara provides state-of-the-art radiation oncology care. He received his medical degree from the Medical College of Georgia School of Medicine, and he completed his residency at Duke University Medical Center.
Brian Acker, MD, a radiation oncologist with BMC since 2018, he is board certified in radiation oncology and provides state-of-the-art radiation oncology care. He has a medical degree from the University of Toronto and completed residencies at Stanford University Medical Center and Princess Margaret Hospital.
Oncology Surgeons

Marcella Bradway, MD, a Pittsfield native, is a board-certified surgeon who specializes in colon and rectal surgery. She is a graduate of the University of Massachusetts School of Medicine, completed a residency in general surgery at the University of Connecticut and a fellowship in colon and rectal surgery at St. Francis Hospital.
Stephen St. Clair, MD, a surgeon who specializes in urology, is board certified in urologic surgery. A graduate of George Washington University School of Medicine & Health Science, he completed his residency at Wilford Hall USAF Medical Center in Texas.
Michael DiSiena, DO, a general surgeon who specializes in surgical oncology, is board certified in both surgery and pathology. He is a graduate of New York College of Osteopathic Medicine, served as chief resident in surgery at BMC and completed a fellowship in surgical oncology.
Christian Galvez, MD, is board certified in surgery and specializes in general and thoracic surgery. He is a graduate of Francisco Marroquin University Medical School in Guatemala, completed a residency in general surgery at BMC and residencies in cardiothoracic surgery and cardiac surgery at Allegheny General Hospital. He is fluent in English, Spanish and German.
Breast Reconstruction Surgeons
George Csank, MD, is a board-certified surgeon who specializes in plastic surgery. He is a graduate of the Medical University of Pecs, completed his residency in general surgery at BMC and a fellowship at New York Hospital/Cornell University in plastic surgery.
Basil Michaels, MD, a board-certified surgeon, specializes in plastic surgery. He is a graduate of Columbia University College of Physicians & Surgeons and completed a residency in general surgery at Bellevue Hospital and a fellowship in microsurgery at Bellevue Hospital.