Dave Coulier revealed he has been diagnosed with Stage 3 non-Hodgkin lymphoma. The actor, perhaps best known for his role as Joey Gladstone in “Full House,” announced the news Wednesday on NBC’s Today show. Coulier said he first noticed signs a little over a month ago when he was sick with a cold, according to Today. He had noticed the lymph nodes in his neck or armpits would swell when he would get sick, but this time he developed a lump the size of a golf ball in his groin, he said.