Megadeth's Dave Mustaine Announces br He Has Throat Cancer The guitarist revealed the newsbr in a post on his Facebook page. Dave Mustaine, via Facebook Mustaine adds that he's br already started treatment. But according to CNN, the band has been forced to cancel many tour datesbr originally set for this year. Mustaine added that Megadeth is still working on their next album. It will the 16th for the br Grammy-winning group after 2016's 'Dystopia.' Mustaine also says that br their at-sea experience, br 'MegaCruise,' is still a go. The inaugural festival is br set for October 13-18.