Angela Terry, a lung cancer patient, tells PEOPLE that Kate's "gentle eye contact" and " level of connection " left an impression. The royal also reassured Rebecca Mendlesohn, who is in a trial for metastatic cancer, and wrapped her in an emotional embrace.

The Princess of Wales made a surprise return to the Royal Marsden Hospital to personally thank staff who looked after her during her cancer treatment on Tuesday. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Princess of Wales received chemotherapy away from fellow cancer patients. Being the Princess of Wales doesn't always have its advantages. When Kate Middleton received her cancer treatment, she kept the details of her type of cancer and its respective stage hidden from the public.