Duchess Sarah Ferguson diagnosed with skin cancer

Duchess Sarah Ferguson was diagnosed with "malignant melanoma."

"Following her diagnosis with an early form of breast cancer this summer, Sarah, Duchess of York has now been diagnosed with malignant melanoma," a representative for the Duchess of York told Fox News Digital.

During the reconstructive surgery following her mastectomy, Ferguson had moles removed which were then tested. One of the moles was determined to be cancerous.

DUCHESS SARAH FERGUSON DIAGNOSED WITH BREAST CANCER

Sarah Ferguson, the Duchess of York, was diagnosed with skin cancer. (Stephane Cardinale - Corbis/Corbis)

"The Duchess wants to thank the entire medical team which has supported her, particularly her dermatologist whose vigilance ensured the illness was detected when it was," the statement continued.  

"She believes her experience underlines the importance of checking the size, shape, color and texture and emergence of new moles that can be a sign of melanoma."

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Her representative added, "She is undergoing further investigations to ensure that this has been caught in the early stages. Clearly, another diagnosis so soon after treatment for breast cancer has been distressing, but the Duchess remains in good spirits."

Sarah Ferguson revealed she was diagnosed with breast cancer in June. (David M. Benett)

In June, Ferguson was diagnosed with an "early form of breast cancer" which had been detected during a routine mammogram screening.

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"She was advised she needed to undergo surgery, which has taken place successfully," her rep confirmed at the time.

"The Duchess is receiving the best medical care and her doctors have told her that the prognosis is good. She is now recuperating with her family."

On New Year's Eve, Ferguson detailed the "ups and downs" of her year in an Instagram post, and also revealed she "beat breast cancer."

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Ferguson, who is famously known as "Fergie," has two daughters, Princess Eugenie and Princess Beatrice with her ex-husband, Prince Andrew.

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Prince Andrew and Sarah Ferguson married in 1986 and divorced in 1996, months before now-King Charles would divorce Princess Diana.

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Fox News Digital's Caroline Thayer contributed to this report.