Megadeth guitarist Dave Mustaine took to the band’s Facebook on Monday morning to reveal that he’s been diagnosed with throat cancer.

Related: Former Megadeth Drummer Nick Menza Dies After Collapsing At OHM Performance

The former Metallica member shared the somber but optimistic news in a statement which reads,

“I’ve been diagnosed with throat cancer. It’s clearly something to be respected and faced head on – but I’ve faced obstacles before. I’m working closely with my doctors, and we’ve mapped out a treatment plan which they feel has a 90% success rate. Treatment has already begun. Unfortunately, this requires that we cancel most shows this year. The 2019 Megacruise will happen, and the band will be a part of it in some form. All up to date information will be at as we get it. Megadeth will be back on the road ASAP. Meanwhile, Kiko, David, Dirk and I are in the studio, working on the follow up to ‘Dystopia’ – which I can’t wait for everyone to hear. I’m so thankful for my whole team – family, doctors, band members, trainers, and more.”

Mustaine (57) and the band’s aforementioned Megacruise is scheduled to hit the Pacific Ocean from Los Angeles for the week of August 13th-18th when it hits with performances from Anthrax, Testament, Dragonforce, and many more. Earlier this year, Mustaine had taken part in the Experience Hendrix Tour which ran throughout March and April.

We’ll update you on the status of Mustaine’s cancer diagnosis as more details come to light. We’re rooting for you, Dave!