Taking to Instagram, Heart singer Ann Wilson announced that she was diagnosed with an unspecified cancer.

"I recently underwent an operation to remove something that, as it turns out, was cancerous. The operation was successful & I'm feeling great but my doctors are now advising me to undergo a course of preventative chemotherapy & I've decided to do it," Wilson said in a statement.

According to the "Barracuda" singer, her medical team has instructed her to "take the rest of the year away from the stage in order to fully recover."

Wilson then addressed fans who had already purchased tickets for the upcoming Royal Flush Tour.

"To the ticket buyers, I really do wish we could do these gigs. Please know that I absolutely plan to be back on stage in 2025. My team is getting those details sorted & we'll let you know the plan as soon as we can. Thank you all for the support. This is merely a pause. I've much more to sing," she added.

Wilson's announcement came after Heart canceled its European concert dates. The shows were canceled because Wilson had to undergo a "time-sensitive but routine medical procedure" that required a minimum recovery time of six weeks.

"I'm OK. Please don't worry. I do apologize for any inconvenience this may cause," Wilson promised. "It's certainly an inconvenience for me. Love & respect always, Ann."

READ MORE: Heart Cancels European Tour as Ann Wilson Undergoes Undisclosed Medical Procedure

Fans have showered her with words of encouragement following her cancer diagnosis in the comments of her Instagram post.

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"Ann, YOU are the most important things to invest your energy in! All of us, your fans, will be there when and if you're ready! Wishing you a speedy and full recovery!!" a fan posted.

"Don't worry about us, you just take care of yourself! Sending you prayers and positive juju!" another noted.

"You matter most. I love you so damn much. You will be in my daily prayers. I look forward to seeing you back on stage where you belong soon my queen. You got this," a user shared.

"Praying for your full recovery & restoration Ann! Your health is the highest priority! I will miss you on my birthday in NYC!" another commented.

"I ask God to heal! May you get well soon and shine again, like the strong star you are.," a fourth person commented.

READ MORE: Ann Wilson Doesn't Like Fans Taking Selfies at Heart Concerts - Here's Why

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