The NCI Specimen Resource Locator is a database that helps researchers locate specimens for research. The database includes resources such as tissue banks and tissue procurement systems with access to normal, benign, precancerous, and/or cancerous human tissue covering a wide variety of organ sites. Researchers specify the types of specimens, number of cases, preservation methods, and associated data they require. The Locator will search the database and return a list of tissue resources most likely to meet their requirements.