The Multinational Association of Supportive Care in Cancer (MASCC) is a multidisciplinary organization dedicated to research and education of supportive care professionals worldwide. The mission of MASCC is to improve the supportive care of people with cancer, from diagnosis, through treatment and survival to the end of life. It operates in collaboration with the International Society of Oral Oncology (ISOO). Founded in 1990, MASCC now includes members from over 70 countries. MASCC provides practice resources and clinical guidelines and publishes the Supportive Care in Cancer journal. Follow us on Twitter, LinkedIn and Facebook.