Princess Kate has surprised fans with thank you cards following her cancer diagnosis. The princess has received many get well soon messages since undergoing a planned abdominal surgery in January and announcing her cancer diagnosis last month. Princess Kate has stepped back from royal duties as she undergoes preventative chemotherapy for an undisclosed form of cancer. Following her announcement, Kate received an outpouring of support worldwide and has now responded to messages of support from fans. One fan took to social media to share her story of receiving a thank you card from Kensington Pa…