New NCCN Guidelines for Rare Tumor Types (IMAGE) National Comprehensive Cancer Network Caption The National Comprehensive Cancer Network® (NCCN®) announces new NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for Ampullary Adenocarcinoma and Malignant Peritoneal Mesothelioma, bringing the total number of clinical guidelines to 83. Credit NCCN Usage Restrictions For media use in coverage only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.