Building on the success of the First International Conference held in 2007 in Hershey, Pennsylvania, the Fourth International Pediatric Abusive Head Trauma Conference provides a unique opportunity to bring together clinicians (physicians and nurses), social workers, researchers, forensic scientists, engineers, and others from a wide range of disciplines to share their research efforts, discuss research challenges and controversies in this field, and develop cross-disciplinary collaborations to further advance our understanding of abusive head injuries.