As the Performing Arts Medicine Association (PAMA) celebrates its 20th anniversary this year, it seems to be a good time to discuss a definition of what the field includes—and, by extension, what it doesn't include. Some may think that this might not be the best use of our time, since we have done pretty well so far without a written definition of the performing arts. However, a presentation at the 27th Annual Symposium on the Medical Problems of Musicians & Dancers on health issues of circus performers and some recent articles in Medical Problems of Performing Artists on artistic and rhythmic gymnasts have helped us broaden the scope of our field. While I find this exciting and another indication that performing arts medicine is a vibrant, essential specialty within the universe of health care, it also makes me wonder what else ought to be included in the field and what shouldn't.