David S. Klimstra, MD

David S. Klimstra, MD
Chair, Pathology Department; James Ewing Alumni Chair in Pathology
​Memorial Sloan Kettering Cancer Center
New York, New York

​Dr. David Klimstra is chairman of the Pathology Department and the James Ewing alumni chair in pathology at Memorial Sloan Kettering Cancer Center (MSKCC). He received his medical degree from Yale University School of Medicine and trained in anatomic pathology at Yale-New Haven Hospital. After a fellowship in oncologic pathology at MSKCC, he joined the professional faculty, where he rose to the rank of attending pathologist in 2003. He is also a professor of pathology and laboratory medicine at Weill Medical College of Cornell University. Dr. Klimstra's expertise involves the diagnosis, classification, and molecular analysis of tumors of the pancreas, biliary tree, liver, and gastrointestinal tract. He has written extensively on many different pancreatic tumor entities, providing the first pathologic description of several, and has characterized the  precursor lesions to pancreatic ductal adenocarcinoma, including pancreatic intraepithelial neoplasia and intraductal papillary mucinous neoplasms. His work has provided many insights into the pathologic features, clinical characteristics, and molecular underpinnings of neoplasms such as acinar cell carcinoma, pancreatoblastoma, pancreatic neuroendocrine neoplasms, and  cystic and intraductal tumors. 

He has authored many of the standard pathological classifications of pancreatic and biliary neoplasms, including the WHO classifications of tumors of the digestive system and endocrine system as well as the Armed Forces Institute of Pathology tumor fascicles on the pancreas and the extrahepatic biliary tree.