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Shirley ShiDu Yan Lab

… Email: sdy1@cumc.columbia.edu About Shirley ShiDu Yan, MD, is a Professor of Surgical Sciences in Surgery. After receiving her medical … College, Dr. Yan completed a postdoctoral fellowship in the Department of Physiology and Cellular Biophysics at …

Last Modified: 02/19/2023 - 13:12

Azathioprine After Lung Transplantation

… Purpose Imuran® is an immunosuppressive medicine that helps prevent organ rejection. Dosage The dose we prescribe for you is based on your weight and … medications, such as allopurinol, can increase the effects of Imuran and further deplete your white blood cell count. …

Last Modified: 02/19/2023 - 13:09

Constipation

… Constipation, the inability to evacuate stool, may occur for a number of reasons. Causes may include functional problems such as … recovery time. Next Steps If you or someone you love is in need of care for a colorectal issue, we’re here to …

Last Modified: 02/05/2026 - 15:54

Esophageal Disorders Program

… skilled foregut surgeons, experienced clinicians, and the world’s leading esophageal disease researchers to offer … request form . For parents and children in need of care for esophageal atresia, please learn more about our … century, we posed a simple question to our doctors: "What is the single most futuristic thing we're doing in surgery …

Last Modified: 08/27/2025 - 11:28

What We’re Reading: 10/16/20

… A few highlights from around the web that made it into our feeds this week. First-of-its-kind examination shows how widely pharma showers … at the state level With the election on our doorstep, this is a timely read—Detailed analysis of a study on how …

Last Modified: 02/23/2023 - 18:02

What We’re Reading: 02/28/20

… A few highlights from around the web that made it into our feeds this week. Just For Kids: A Comic Exploring The New Coronavirus This one is for your kids! They are likely hearing the word … in school, online, or on TV and probably have a lot of questions. Here, the information from experts has been …

Last Modified: 02/23/2023 - 18:01

New Tool in Breast Reconstruction Puts Control in Patients' Hands

… With nearly 250,000 new cases of breast cancer each year, the demand for reconstruction surgery is high and now a new technology is making that uncomfortable …

Last Modified: 02/23/2023 - 18:00

Evaluation for Lung Transplant Surgery

… as your pulmonologist decides that lung transplantation is a possible treatment option for you, he or she will contact the NewYork-Presbyterian Center for Advanced Lung Disease and … at Columbia University Medical Center. The first goal of the program is to determine whether lung transplantation …

Last Modified: 03/06/2026 - 00:14

Sleeve Gastrectomy

… A sleeve gastrectomy is a weight loss procedure that removes most of the stomach – reducing the size of the stomach and …

Last Modified: 06/24/2024 - 13:43

Jean C. Emond, MD

… Dr. Emond is the Vice Chairman of Surgery at Columbia University. He … and biliary surgery in children and adults, including the first living donor liver transplantation (LDLT) in the …

Last Modified: 06/11/2026 - 12:37

Zilver® PTX® Drug-Eluting Peripheral Stent Post-Approval Study

… The Zilver® PTX® V Clinical Study is a post-market clinical trial required by the US FDA to provide continued evaluation of the safety and effectiveness of the Zilver …

Last Modified: 02/13/2023 - 21:06

COMMiT: A Comprehensive Approach

… they too hard to stick with or just not successful? COMMiT is here to help you lose weight fast and keep it off. COMMiT … approach to weight loss, providing those who need it with the treatments, techniques, and support to make an often … develop an individualized weight loss plan. In recognition of the fact that many factors impact weight and keeping …

Last Modified: 05/30/2025 - 12:01

Am I a Candidate for Weight Loss Surgery?

… problems and tend to have a shortened life span. There is also added potential risk from continued weight increase. The risk of severe obesity is greater than that of its surgical …

Last Modified: 12/10/2025 - 17:11

COVID-19 Update from Dr. Smith: 3/29/20

… Each day during the COVID-19 crisis, Dr. Craig Smith, Chair of the Department of Surgery, sends an update to faculty and … with us. Dear Colleagues, The slope of the new-case curve is steady.  As long as that remains true, and for some period …

Last Modified: 02/23/2023 - 18:01

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