The Duchess of York has shared her “shock” at being diagnosed with malignant melanoma, a type of skin cancer, but says she is in “good spirits”.
In an Instagram post, she thanked her fans for their “love and support”.
The melanoma was detected after she had a cancerous mole removed during her treatment for breast cancer.
The duchess, Sarah Ferguson, had several moles checked and removed while having reconstructive surgery.
The duchess is the third royal to undergo a medical procedure this week.
“I have been taking some time to myself as I have been diagnosed with malignant melanoma, a form of skin cancer,” she said on Instagram on Monday.
It was her second cancer diagnosis in a year after she was diagnosed with breast cancer in the summer and had a mastectomy and reconstructive surgery.
“Another cancer diagnosis has been a shock, but I’m in good spirits and grateful for the many messages of love and support.”
On Sunday her spokesman said: “Her dermatologist recommended that several moles were removed and tested at the same time as the duchess was having reconstructive surgery following her mastectomy, and one of them was found to be cancerous.
He added that she was having further tests to make sure it was caught early.