Meet Our Team
Jennifer Tseng, MD, MPH
Chief, Division of Surgical Oncology
Jennifer Tseng, MD, MPH, Chief, Division of Surgical Oncology at Beth Israel Deaconess Medical Center, received her medical degree from the University of California at San Francisco School of Medicine. Dr. Tseng completed her internship and residency in Surgery at Massachusetts General Hospital in Boston, and a fellowship in Surgical Oncology at MD Anderson Cancer Center in Houston. Dr. Tseng’s clinical interests include: pancreatic, stomach, liver, and biliary surgery; the Whipple procedure for cancer, cysts and other conditions; minimally invasive surgery; gastrointestinal surgery; familial/hereditary gastrointestinal cancers.
View Dr. Tseng's research page
Rosemary Duda, MD, MPH
Dr. Duda received her medical degree from Hershey Medical Center at Pennsylvania State University and her MPH degree in Population and International Health from Harvard School of Public Health. She completed her training in general surgery at the University of Vermont in Burlington, VT, and her surgical oncology fellowship at the City of Hope National Medical Center in Duarte, CA.
Dr. Duda’s clinical interests include surgical oncology, melanoma, sarcoma, breast cancer, and genetic counseling for high risk BRCA1/2 individuals. Her research interests includes program development to reduce the risk of maternal to child transmission of HIV from mother to child in Nigeria.
Per-Olof Hasselgren, MD, PhD
Dr. Per-Olof Hasselgren received his medical degree from University of Gothenburg, Medical Facility in Sweden, where he also completed his PhD. He completed surgical residencies at both Oskarshamn’s Hospital and Sahlgrens University Hospital in Sweden. He completed a fellowship in surgery at the University of Cincinnati Medical Center in Cincinnati. He is board certified in Surgery and his clinical interests include general surgery, breast surgery, endocrine surgery (Thyroid, Parathyroid, and Adrenal Gland Surgery).
Dr. Hasselgren serves as Vice Chairman of Research and the Director of Endocrine Surgery at Beth Israel Deaconess Medical Center.
View Dr. Hasselgren's research page
Mary Jane Houlihan, MD
Dr. Houlihan received her medical degree from University of Illinois at Chicago College of Medicine in Chicago. She completed an internship, residency, and fellowship in surgery at Beth Israel Deaconess Medical Center in Boston. Board certified in Surgery, Dr. Houlihan’s clinical interests include breast disease, breast surgery, and surgical oncology.
Kari J. Kansal, MD
Dr. Kansal earned her medical degree from University of Minnesota at Minneapolis Medical School in Minneapolis. She completed her internship and residency in general surgery at University of California San Diego Medical Center in San Diego, and her fellowship in breast surgery at Massachusetts General Hospital in Boston. Dr. Kansal is board certified in Surgery. Her clinical interests include breast surgery, surgical oncology, high risk breast cancers, breast conservation operations, and breast disorders.
A. James Moser, MD
Dr. Moser received his medical degree from Washington University in St. Louis School of Medicine in St. Louis. He completed a general surgery internship and residency at UCLA Medical Center in Los Angeles. Board certified in Surgery, Dr. Moser’s clinical interests include pancreatic cancer, bile duct cancer, acute pancreatitis, chronic pancreatitis, gastric cancer, gastric surgery, advanced robotic and minimally invasive surgery, duodenal masses, and biliary tract disease.
Ranjna Sharma, MD
Dr. Sharma earned her medical degree at Ohio State University College of Medicine in Columbus, Ohio. She completed an internship and residency in general surgery at Cleveland Clinic in Cleveland, as well as a residency in general surgery at University of Illinois Medical Center in Chicago. Dr. Sharma completed a fellowship in breast surgery at the University of Texas M.D. Anderson Cancer Center in Houston. Board certified in Surgery, her clinical interests include benign breast disease, breast cancer, skin sparing and nipple sparing mastectomy, and oncoplastic reconstruction.
View Dr. Sharma's research page
Nicholas Tawa, MD, PhD
Dr. Tawa received medical degree from Harvard Medical School in Boston, and his PhD from Harvard University. He completed an internship and residency general surgery at Brigham and Women’s Hospital in Boston. Board certified in Surgery, Dr. Tawa’s clinical interests include surgical oncology, gastrointestinal oncology, sarcoma surgery, melanoma, breast surgery, laparoscopic surgery and general surgery.
Michael Wertheimer, MD
Dr. Wertheimer received his medical degree from University of Pennsylvania School of Medicine in Philadelphia. He completed a general surgery internship and residency at Beth Israel Deaconess Medical Center in Boston, as well as a surgical residency at UMASS Memorial Medical Center in Worcester, MA. He is board certified in surgery and his many clinical interests include breast surgery, the study and care of breast disease, expedited care for patients with breast lumps or abnormal mammograms, management of multidisciplinary care for patients with breast cancer, and ambulatory systems improvement.
Michael Yaffe, MD, PhD
Dr. Yaffe received his medical degree from Case Western Reserve University School of Medicine, Cleveland, where he also completed his PhD in Biophysical Chemistry. He completed a fellowship in critical care at the Harvard-Longwood Critical Care Program at Harvard Medical School and residencies in both General Surgery and Surgical Oncology at University Hospitals of Cleveland and Deaconess Hospital in Boston. Board certified in Surgical Critical Care, Dr. Yaffe’s clinical interests includes trauma, critical care, and general surgical emergencies. Dr. Yaffe’s main research interests include biology studies of cell signaling, approaches to targeted cancer therapy, protein-protein interactions and modular protein domains in signal transduction, and protein kinase signaling pathways involved in cell cycle control, DNA damage and inflammation.
Susan Hagen, PhD
Leo Otterbein, PhD
Barbara Wegiel, PhD