Catherine, Princess of Wales, opened up about sneaking into a major U.K. hospital for secret cancer treatment and appeared moved by one patient's comment on the day she announced she was in remission.

The Princess of Wales, who revealed in March that she had been diagnosed with cancer after speculation surrounding her whereabouts, said on Tuesday she is in remission.

Catherine, Princess of Wales, said she was relieved to be in remission on Tuesday after visiting the London hospital where she received treatment for cancer to thank all the medics and staff there.