Full House alum Dave Coulier addressed concerns about his recent weight loss and change in appearance as he continues to battle cancer. "I haven't posted in quite a while. The last time I did, some of you said I looked differently and I sound differently. I do," Coulier, 66, told fans in a new video posted via Instagram on Thursday, May 7. "What you are seeing is the side effect of the extensive radiation that I went through for carcinoma in my throat, and I haven't been able to eat solid food in months.