Britain's Princess Catherine and future queen revealed Monday she has completed chemotherapy treatments for her undisclosed type of cancer and in "coming months" will take on more royal duties.

In a video message, Catherine said she would return to more of her duties, a positive development, but many questions remain about her condition and treatment.

The British royal has confirmed that she has completed her cancer treatment, almost six months after revealing on 22 March that she had been diagnosed with cancer and was undergoing preventative chemotherapy.