Dave Coulier joins TODAY to share an update on his “rollercoaster" journey with non-Hodgkin’s lymphoma and reveals he has been diagnosed with another form of cancer at the base of his tongue. Coulier opens up about how his health issues inspired him to start a company called AwearMarket, a line of all-natural wellness products, the support he's received from his "Full House" family, becoming a grandfather, and more.

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