As it does each year, the Proceedings of The Hip Society provide readers with stimulating new clinical and basic research, alongside commentaries on current topics that are relevant to surgeons who perform adult reconstructive procedures of the hip. The topics chosen for presentation encompassed a wide variety of subjects, including preoperative planning and surgical technique particularly for difficult cases, selection and outcomes of different bearing couples and new implants, standardized definitions for and listing of complications and adverse events, and novel imaging techniques for diagnosis and treatment of hip arthritis.