Full House star Dave Coulier shared a health update about his physical changes and his cancer treatment following "extensive radiation." "I haven't posted in quite a while, and the last time I did, some of you said that I look differently and I sound differently - and I do. What you're seeing is the side effects of extensive radiation that I went through for carcinoma in my throat," Coulier said in an Instagram video shared on Thursday."I haven't been able to eat solid food in months and so I've lost 45 pounds. That's what you're seeing, and it's affected my ability to speak," he shared.