Kate Middleton's visit to the hospital where she had cancer treatment left an impression on Angela Terry, who tells PEOPLE what it was like to meet Princess Kate.

Princess Catherine surprised cancer patients at the same hospital where she was treated last year for her type of cancer.

We don’t need to know what cancer she had,” said one woman who spoke to Kate on Tuesday. “We just know she’s been through surgery, she’s been through chemo—and one year later, my goodness, look, she is here.

"It was just like talking to a friend about a really horrible time in life and how you find ways of getting through it," Katherine Field tells PEOPLE of the Princess of Wales

The Princess of Wales shared a few details on her cancer treatment with patients at the hospital where she was treated.

Kate Middleton visited the Royal Marsden Hospital and chatted with a patient who was undergoing chemotherapy as treatment. The two spoke about their shared experience - battling cancer.

Terry continued, describing Kate as "so open." "She had this 'We’re in this together' approach, so I think people felt they were able to say all sorts of things. It was really h

"It was really heart-warming to watch," Angela Terry tells PEOPLE of Princess Kate's candor when she bonded with cancer patients

Kate Middleton spent much of last year battling an unspecified form of cancer. The Princess confirmed earlier this week that her cancer is in “remission.” Now, Kate is making a surprising admission about her grueling chemotherapy treatments.