Rasa Zarnegar, M.D.

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.

Dr. Cynthia Tsay is an Assistant Professor of Medicine at Weill Cornell Medicine and New York-Presbyterian Hospital and a general gastroenterologist with a clinical and research interest in early gastric cancer, gastric intestinal metaplasia, and other conditions involving the stomach. She is interested in the application of machine learning and artificial intelligence in the risk stratification and early detection of premalignant lesions in high risk populations, as well as the role of the microbiome in these conditions and ways in which medications alter the gastrointestinal microbiome. She has published in Gastroenterology, Clinical Gastroenterology and Hepatology, Alimentary Pharmacology & Therapeutics and the American Journal of Gastroenterology. She obtained her B.A. in the History of Science and the History of Medicine at Yale College and her M. Phil in the History, Philosophy, and Sociology of Science, Medicine, and Technology at the University of Cambridge. Dr. Tsay returned to New Haven where she earned her M.D. at the Yale School of Medicine and completed her residency in Internal Medicine at Yale New Haven Hospital. She also has a M.P.H in Epidemiology from the Harvard T.H. Chan School of Public Health. She completed her fellowship training in Gastroenterology and Hepatology at the Johns Hopkins Hospital where she served as chief fellow during her last two years. Dr. Tsay is also passionate about medical education and the experience of trainees, having served as president of the Yale Resident and Fellow Senate and the chair of the Johns Hopkins Clinical Fellows Council.