Kate, Princess of Wales, found cancer after surgery. 

She's having chemotherapy for prevention. 

Cancer discovered post-abdominal surgery. 

Kate's message filmed by BBC Studios. 

She's in early stages of chemotherapy. 

Kate seeks understanding during treatment. 

King Charles praises Kate's courage. 

No specific cancer type disclosed. 

Speculation arose after doctored images. 

Kate edits images, spurring more rumors. 

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