Kate Middleton health: Catherine, Princess Of Wales, has cancer

Her Royal Highness The Princess of Wales announced this evening that she is undergoing treatment for cancer. The 42-year-old princess said she needed to recover from surgery before she could start “preventative chemotherapy”, after advice from her medical team. In a video message, Kate said she had needed time to come to terms with the news and tell her children Prince George, 10, Princess Charlotte, 8, and Prince Louis, 5, before informing the public.

She said: “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.

“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.

“In January, I underwent major abdominal surgery in London and at the time, it was thought that my condition was non-cancerous. The surgery was successful. However, tests after the operation found cancer had been present. My medical team therefore advised that I should undergo a course of preventative chemotherapy and I am now in the early stages of that treatment.

“This of course came as a huge shock, and William and I have been doing everything we can to process and manage this privately for the sake of our young family.

“As you can imagine, this has taken time. It has taken me time to recover from major surgery in order to start my treatment.

“But, most importantly, it has taken us time to explain everything to George, Charlotte and Louis in a way that is appropriate for them, and to reassure them that I am going to be ok.

“As I have said to them; I am well and getting stronger every day by focusing on the things that will help me heal; in my mind, body and spirits.

Having William by my side is a great source of comfort and reassurance too. As is the love, support and kindness that has been shown by so many of you. It means so much to us both.

“We hope that you will understand that, as a family, we now need some time, space and privacy while I complete my treatment. My work has always brought me a deep sense of joy and I look forward to being back when I am able, but for now I must focus on making a full recovery.

“At this time, I am also thinking of all those whose lives have been affected by cancer. For everyone facing this disease, in whatever form, please do not lose faith or hope. You are not alone.”

In January, the Palace announced that the Princess of Wales was in hospital recovering from abdominal surgery but did not provide further details on the nature of her condition. They added that the surgery was "successful" but immediate royal engagements had been postponed.

The statement from Kensington Palace said: “Her Royal Highness The Princess of Wales was admitted to hospital yesterday for planned abdominal surgery. The surgery was successful and it is expected that she will remain in hospital for ten to fourteen days, before returning home to continue her recovery.

"Based on the current medical advice, she is unlikely to return to public duties until after Easter.

"The Princess of Wales appreciates the interest this statement will generate. She hopes that the public will understand her desire to maintain as much normality for her children as possible; and her wish that her personal medical information remains private.

"Kensington Palace will, therefore, only provide updates on Her Royal Highness’ progress when there is significant new information to share.

"The Princess of Wales wishes to apologise to all those concerned for the fact that she has to postpone her upcoming engagements. She looks forward to reinstating as many as possible, as soon as possible."

Last week The London Clinic hospital launched an investigation following claims that staff attempted to view the private medical records of Catherine, Princess of Wales without permission.

At least one member of staff is reported to have attempted to access the data at The London Clinic. The London Clinic’s chief executive, Al Russell, said in a statement: “Everyone at the London Clinic is acutely aware of our individual, professional, ethical and legal duties with regards to patient confidentiality. We take enormous pride in the outstanding care and discretion we aim to deliver for all our patients that put their trust in us every day.

“We have systems in place to monitor management of patient information and, in the case of any breach, all appropriate investigatory, regulatory and disciplinary steps will be taken. There is no place at our hospital for those who intentionally breach the trust of any of our patients or colleagues.”

The alleged incident has been reported to the Information Commissioner's Office (ICO), which has launched a separate investigation alongside The London Clinic's probe. In a statement, the ICO said: "We can confirm that we have received a breach report and are assessing the information provided."