Prince William and Kate mark wedding anniversary in Scotland
Catherine, Princess of Wales, revealed in January she was "in remission", having announced last March she had been diagnosed with an unspecified form of the disease and was undergoing chemotherapy.
She has since returned to frontline public duties, but with a slimmed-down schedule and shorter engagements.
The couple will spend two days touring the western Scottish islands of Mull and Iona, where they will "celebrate and connect with rural island communities", according to their Kensington Palace office.