Image Credit: Getty Images Dave Coulier, best known for playing the lighthearted character Joey Gladstone in Full House, revealed that he was diagnosed with stage 3 Non-Hodgkin lymphoma in November 2024 - about a month after he was diagnosed and began treatment. While recalling how he found out about his condition, Dave told People his "doctors called [him] back and they said, 'We wish we had better news for you, but you have non-Hodgkin's lymphoma and it's called B cell and it's very aggressive.