Kate Middleton's Cancer Diagnosis: Everything We Know

Kate Middleton has been diagnosed with cancer.

"I wanted to take this opportunity to say thank you, personally, for all the wonderful messages of support and for your understanding whilst I have been recovering from surgery," the Princess of Wales shared in a video message March 22, her first formal appearance since undergoing abdominal surgery in January. "It has been an incredibly tough couple of months for our entire family."

"But I've had a fantastic medical team who have taken great care of me, for which I am so grateful," Kate—who shares kids Prince George, 10, Princess Charlotte, 8, and Prince Louis