Full House star Dave Coulier has revealed he is undergoing treatment for tongue cancer, a year after beating non-Hodgkin lymphoma. Coulier, 66, announced the diagnosis on NBC’s Today show on Tuesday, telling co-anchor Craig Melvin that the new cancer—an HPV-related oropharyngeal carcinoma—was discovered during a follow-up PET scan.

“Full House” actor Dave Coulier announced he has been diagnosed with tongue cancer just months after beating non-Hodgkin’s lymphoma. Coulier, 66, shared the news on the “Today” show Tuesday, describing the diagnosis as a “shock to the system.” The actor said doctors confirmed the tongue cancer is unrelated to his previous illness.