JENKINTOWN, Pa.--(BUSINESS WIRE)--The National Comprehensive Cancer Network (NCCN) announces updates to two NCCN Clinical Practice Guidelines in Oncology™ -- Esophageal Cancer and Gastric Cancer. The NCCN Guidelines are updated continuously by panels of world-renowned experts and are widely recognized and applied as the standard of care in oncology in the United States in both the community and the academic practice settings.