Ava L. Liberman, MD

Joshua A. Fein, M.D., is an Assistant Professor of Medicine within the Division of Hematology and Medical Oncology at Weill Cornell Medicine and serves as the Chair of Quality Assurance and Director of Informatics for the Bone Marrow Transplant and Cellular Therapy Program and Assistant Attending physician at NewYork-Presbyterian Hospital. Dr. Fein’s clinical interest is in caring for individuals undergoing stem cell transplantation to treat leukemia and other disease of the blood and bone marrow. Dr. Fein received his Bachelor of Music in 2008 from the Eastman School of Music at the University of Rochester, where he trained as an operatic baritone. He continued his musical training in Germany at the Hochschule für Musik Karlsruhe, where he received a Master of Singing degree in 2011. Upon returning to the United States, Dr. Fein’s focus shifted to pursuing medical training, and he obtained his medical degree from the American Program at Tel Aviv University in Israel. During his medical studies, Dr. Fein began to research hematopoietic cell transplantation under the mentorship of Profs. Roni Shouval and Arnon Nagler at Sheba Medical Center in Ramat Gan, Israel, leading to publications and international presentations, many in collaboration with the European Society for Blood and Marrow Transplantation. He completed a residency in Internal Medicine at the University of Connecticut and hematology/oncology fellowship at Weill Cornell Medicine/NewYork- Presbyterian. His research in the transplant field has led to over 30 publications in journals including first-author publications in the Journal of Clinical Oncology and The Lancet Haematology. He is the recipient of the prestigious Research Training Award for Fellows from the American Society of Hematology and, more recently, holds a KL2 award supporting his ongoing investigation of the recovery of a healthy immune system after undergoing donor stem cell transplantation.

Christopher Comstock, MD is a Board-Certified radiologist specializing in Breast Imaging. He is an Assistant Professor of Clinical Radiology at Weill Cornell Medicine and an Assistant Attending Radiologist at the NewYork-Presbyterian Hospital-Weill Cornell Campus.Dr. Comstock graduated from the University of San Diego where he earned his B.A. in 1986. He then received his M.D. from the Tulane University Medical School in 1990.Following an internship at Ochsner Clinic and Foundation, Dr. Comstock completed his residency in Radiology from 1991 to 1995 at Ochsner Clinic and Foundation. He then completed his fellowship in Breast Imaging from 1995 to 1996 at University of Chicago.After twenty-eight subsequent years in clinical practice, Dr. Comstock joined the faculty at Weill Cornell Medicine in September 2024 as an Assistant Professor of Clinical Radiology.Dr. Comstock is a member of the following radiological societies:• American Roentgen Ray Society• American College of Radiology• Society of Breast Imaging• Radiological Society of North America• UCSD Moores Cancer Center• San Diego Radiological Society• American College of Radiology Imaging Network• ECOG-ACRIN• Society of Breast MRI

Erin Hassett, ANP-BC is a Nurse Practitioner at Weill Cornell Medicine in Endocrine Surgery. She is a board-certified Adult Nurse Practitioner, earning her Master's of Science degree in 2009 from New York University. Erin Hassett runs the Adrenal Nodule Clinic which is a unique program designed to expedite the work-up of adrenal nodules found incidentally on imaging studies done for other purposes. This includes guiding patients through necessary bloodwork and integrating collaborative evaluations with Endocrine Surgeons, Endocrinologists and Radiologists when appropriate. Erin will assess patients for functioning, verse non-functioning nodules and stratify the risk of them being cancerous or benign.In addition to the Adrenal Nodule clinic, Erin runs the Endocrine Tumor surveillance program, which includes monitoring low-risk thyroid cancer patients undergoing active surveillance instead of surgery. Studies have shown papillary thyroid cancers are slow growing and a sub-set of patients can be safely monitored, avoiding surgery. After patients are deemed candidates for surveillance by our Endocrine Surgeon’s patients will have biannual follow up with Erin to monitor for stability.For patients requiring adrenal, thyroid and parathyroid surgery, Erin will facilitate surgical planning and provide long-term follow up care. Erin works closely with her colleagues and patients to make sure all patients' needs are met.