Mary Tyler MooreMary Tyler Moore will undergo surgery to remove a benign tumor in the lining tissue of her brain, according to PEOPLE. But the meningioma comes as no surprise to Moore, she and her doctor have been keeping an eye on the growth for years.

"At the recommendation of her neurologist, who has been monitoring this for years, and a neurosurgeon, Mary decided to proceed with this fairly routine procedure," her rep told the magazine.

From 'The Dick Van Dyke Show' to her eponymous 'The Mary Tyler Moore Show' to her most recent appearance alongside Betty White in the season premiere of 'Hot in Cleveland,' Moore's strong Hollywood career is a true indication of her own fortitude -- no tumor has a chance against this on and off-screen go-getter.