Context.— Immunohistochemistry has become a useful ancillary study in the identification and classification of pancreatic neoplasms. The diagnostic accuracy has been significantly improved because of the continuous discoveries of tumor-associated biomarkers and the development of effective immunohistochemical panels. Objectives.— To identify and classify pancreatic neoplasms by immunohistochemistry. Data Sources.— Literature review and authors' research data and personal practice experience were...