title: A SPECIAL MEETING REVIEW EDITION: Highlights in Anti-Tumor Necrosis Factor Monitoring and Antibody Monitoring From the 2014 DDW Meeting: Digestive Disease Week 2014 May 3-6, 2014 • Chicago, Illinois: Special Reporting on:• Therapeutic Monitoring of Anti-TNF Levels and Antibodies to Predict Response and Achieve Mucosal Healing• Prospective Therapeutic Drug Monitoring and Optimization of Infliximab Maintenance Therapy in IBD• Classification of Non-IBD, Crohn's Disease and Ulcerative Colitis in a Young Patient Population Using a Multi-Marker Diagnostic Panel• Persistence of Antibodies to Infliximab for More Than Two Months Predicts Loss of Response to Infliximab in Inflammatory Bowel Diseases• Pre-Operative Serological Markers May Predict Postoperative Crohn's Disease Recurrence: Results From a Prospective Mono-Centric Trial• Antibodies and Levels of Biologies-Reactive vs Proactive Measurements• Higher 6-Thioguanine Nucleotide Concentrations Are Associated With Higher Trough Levels of Infliximab in Patients on Combination Therapy• The Clinical and Immunological Significance of Low Levels of Infliximab in the Absence of Anti-lnfliximab Antibodies in Patients With IBD• Antibodies to Adalimumab Predict Inflammation in Crohn's Patients on Maintenance Adalimumab Therapy• ATG16L1 Genotype Is Associated With Response to Anti-TNFWith Expert Commentary by:William J. Sandborn, MDProfessor and Chief, Division of Gastroenterology Director, UCSD IBD CenterUC San Diego Health SystemLa Jolla, California.