Objectives: To investigate the incidence, laryngeal distribution, management, and postoperative clinical course of patients with newly diagnosed adult-onset recurrent respiratory papillomatosis (RRP) in Japan.
Methods: An initial brief questionnaire was sent to 782 institutions, including all 101 core and 627 collaborating institutions providing board certification programs accredited by the Japanese Society of Otorhinolaryngology-Head and Neck Surgery. A detailed questionnaire regarding patient age, sex, Derkay's score, surgery, and postoperative clinical course was sent to 196 institutions caring for patients with either newly or previously diagnosed RRP.