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.

“To go through chemotherapy and feel that relief of whoa, it’s gone, and then to get a test that says, well now you’ve got another kind of cancer... it is a shock to the system,” said the actor and comedian.

Coulier, best known for playing Uncle Joey Gladstone on the ABC sitcom, said doctors found a growth at the base of his tongue.

After multiple biopsies, he was diagnosed in October with early-stage, P16-positive squamous cell carcinoma—a form linked to

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