An urgent investigation is underway at The London Clinic in the UK after it was revealed hospital staff allegedly attempted to access Kate Middleton's private medical records.
The Clinic was where the Princess of Wales underwent abdominal surgery in January this year.
It has been claimed at least one member of staff tried to access her notes without permission to do so.
"This is a major security breach and incredibly damaging for the hospital, given its unblemished reputation for treating members of the Royal Family," a source at the hospital told the Daily Mail.
"Senior hospital bosses contacted Kensington Palace immediately after the incident was brought to their attention and assured the palace there would be a full investigation.
"The whole medical staff have been left utterly shocked and distraught over the allegations and were very hurt that a trusted colleague could have allegedly been responsible for such a breach of trust and ethics."
The paper also reported Kate was aware of the alleged incident.
The hospital has also cared for King Charles during his unspecified cancer treatment.
The London Clinic issued a statement to UK tabloid The Mirror, saying: "We firmly believe that all our patients, no matter their status, deserve total privacy and confidentiality regarding their medical information."
Details of the medical procedure Kate underwent have been kept under wraps, with Kensington Palace only saying at the time it would not be issuing regular updates on her health.
"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."
However, since she then stepped back to recuperate post-surgery, there has been a surge in conspiracy theories about her whereabouts since the operation.
Those culminated with Kensington Palace putting out a statement in March, which reiterated Kate is "doing well" in her recovery.
She is widely expected to be back in the public eye after mid-April when she is believed to be returning to royal duties. There has been speculation she may be part of the traditional Easter Sunday church service which is usually attended by the Royal Family.
On the weekend, she was videoed in public for the first time since her abdominal surgery and since the Mother's Day photo editing scandal erupted.
UK tabloid The Sun published a video of a smiling Kate walking with husband William after a shopping trip at a farm in Windsor.
