Elizabeth O'donnell is an Internal Medicine specialist and an Oncologist in Boston, Massachusetts. Dr. O'donnell is rated as an Advanced provider by MediFind in the treatment of Germ Cell Tumor. Her top areas of expertise are Multiple Myeloma, Smoldering Multiple Myeloma, Monoclonal Gammopathy of Undetermined Significance (MGUS), Orchiectomy, and Bone Marrow Aspiration.

Dr. Shemmeri received her undergraduate degrees from the University of Massachusetts, Amherst. She received a Doctor of Pharmacy from the Massachusetts College of Pharmacy and her medical degree from Ross University School of Medicine. She completed resident training at North Shore University Hospital Long Island Jewish Medical Center and a fellowship in cardiothoracic surgery at Albany Medical Center.Dr. Shemmeri also completed a clinical and research fellowship in thoracic and foregut surgery at the Swedish Cancer Institute and Medical Center, a critical care clinical pharmacy residency at the University of Maryland Medical Center and a minimally invasive thoracic surgery fellowship at the Brigham.Her clinical interests focus on minimally invasive thoracic surgery and foregut and her research interests include clinical outcomes in foregut, specifically achalasia and esophageal cancer. Dr. Shemmeri is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Achalasia, Lung Nodules, and Endoscopy.

Dr. Wain joined the Brigham in February 2023 as a Surgeon, and Associate Chief of Quality and Safety, both for the Thoracic Surgery Department. Before joining the Brigham, Dr. Wain was the chief of the Division of Thoracic Surgery and the vice chairman of the Department of Surgery at St. Elizabeth’s Medical Center He’s a member of various societies, including the American Thoracic Society, the American College of Chest Physicians, the Society of Thoracic Surgeons and the American Association for Thoracic Surgery. Dr. Wain received his undergraduate degree from Pennsylvania State University and his medical degree from Jefferson Medical College. He completed residency training in surgery at Massachusetts General Hospital. After a surgical research fellowship at the City of Hope National Medical Center, he completed a fellowship in cardiothoracic surgery at Massachusetts General Hospital and Toronto General Hospital. He is certified by the American Board of Surgery and the American Board of Thoracic Surgery. Dr. Wain is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. His top areas of expertise are Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), Pleuropulmonary Blastoma, Endoscopy, and Osteotomy.

Dr. Steven J. Mentzer is a thoracic surgeon at Brigham and Women’s Hospital and Dana-Farber Brigham Cancer Center. He is a professor of surgery at Harvard Medical School.Dr. Mentzer received his medical degree from the University of Minnesota and received his general surgical residency training at the Brigham. He completed a cardiothoracic surgery fellowship at the University of Toronto. Dr. Mentzer also completed a research fellowship at Dana-Farber Cancer Institute where he investigated the molecular mechanisms involved in the regulation of T lymphocyte function. He is board certified in surgery, cardiothoracic surgery, and surgical critical care.Dr. Mentzer’s clinical interests include diseases of the lungs and thoracic cancers, minimally invasive surgery of the lungs and esophagus, and minimally invasive surgery for esophageal cancer. Principal investigator for The Mentzer Lab, Dr. Mentzer is currently studying the adaptive processes involved in blood vessel growth (angiogenesis) and lung regeneration. Dr. Mentzer is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. His top areas of expertise are Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), ALK-Positive Non-Small Cell Lung Cancer, Gastrostomy, and Endoscopy.

Allison O'neill is a Hematologist and an Oncologist in Boston, Massachusetts. Dr. O'neill is rated as an Advanced provider by MediFind in the treatment of Germ Cell Tumor. Her top areas of expertise are Hepatoblastoma, Ewing Sarcoma, Osteosarcoma, Neuroblastoma, and Hepatectomy.

Dr. Steimer serves as a surgeon in the Division of Thoracic Surgery and holds a clinical instructor position at Harvard Medical School. She practices at Brigham and Women’s Hospital and Southcoast Hospital.  Graduating with a medical degree from the University of Kentucky, she completed her general surgery training at Baylor University Medical Center. Furthering her expertise, she underwent cardiothoracic surgical residency and an additional fellowship in foregut and general thoracic surgery at Brigham and Women’s Hospital. Her passion for oncology ignited during her time at St. Jude Children’s Research Hospital, where she delved into researching genes associated with cell death pathways. Her research interest is focused on patient frailty and optimizing care for elderly patients with lung cancer and other thoracic malignancies. Dr. Steimer is dedicated to providing compassionate and personalized care to her patients. She performs surgeries with minimally invasive techniques (through small incisions) to decrease pain and improve patient recovery from surgery. Dr. Steimer is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. Her top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Mesothelioma, and Lung Nodules.

Dr. Matthew Pommerening is an Associate Surgeon in the Division of Thoracic Surgery at Brigham and Women’s Hospital and Dana-Farber Cancer Institute and Clinical Instructor in Surgery at Harvard Medical School. Dr. Pommerening is a native Texan and graduate of the University of Texas at Austin. He received both his medical degree and general surgery training from the University of Texas McGovern Medical School in Houston, where he also completed a two-year clinical research fellowship and Master of Science degree in Clinical Research. He went on to complete a cardiothoracic surgery residency at the University of Pittsburgh Medical Center (UPMC) followed by a thoracic surgery fellowship at the Brigham. He is board certified in general surgery and thoracic surgery, and he is a member of the American College of Surgeons (ACS) and the Association for Academic Surgery (AAS).Dr. Pommerening’s clinical practice is focused on the surgical and multidisciplinary care of patients with both benign and malignant thoracic and foregut diseases. His clinical interests and specialty include minimally invasive surgery, diagnostic and interventional airway procedures, thoracic oncology, and advanced foregut surgery. He is also interested in clinical outcomes research focused on designing and conducting clinical trials and quality improvement initiatives to advance evidence-based practice in thoracic surgery. Dr. Pommerening is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. His top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Lung Nodules, Collapsed Lung, and Endoscopy.

Christopher Sweeney is an Oncologist in Boston, Massachusetts. Dr. Sweeney is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. His top areas of expertise are Prostate Cancer, Familial Prostate Cancer, Testicular Cancer, Orchiectomy, and Prostatectomy.

Susan Chi is a Pediatric Hematologist Oncology provider in Boston, Massachusetts. Dr. Chi is rated as an Experienced provider by MediFind in the treatment of Germ Cell Tumor. Her top areas of expertise are Rhabdoid Tumor, Glioma, Medulloblastoma, and Brain Stem Cancer.