Kate Middleton didn't wear her engagement ring that once belonged to Princess Diana at the Royal Marsden Hospital in London on Jan. 14. Inside why and more about Princess Kate's new ring.

Princess Kate stepped out on a solo visit today to the Royal Marsden Hospital in Chelsea, where she received treatment for her own cancer diagnosis last year. The Princess of Wales, 43, arrived on Tuesday to speak to staff and patients at the hospital, which her and Prince William have now become royal patrons of.

In a heartfelt statement on Wednesday, the Princess of Wales, Kate Middleton, revealed that she has successfully gone into remission from cancer, providing a rare insight into the personal health struggles she has overcome. The news follows her visit to the Royal Marsden Hospital on Tuesday, 14th January, where she received treatment.