Kate Middleton shares cancer diagnosis post-abdominal surgery via Instagram. The nature of cancer has not been revealed. The Princess of Wales has updated about her health condition via a video message. Speculation ensues over her public absence as the Princess of Wales. Surgeons perform minimally invasive procedures for improved recovery times.Kate Middleton shares cancer diagnosis post-abdominal surgery via Instagram. The nature of cancer has not been revealed. The Princess of Wales has updated about her health condition via a video message. Speculation ensues over her public absence as the Princess of Wales. Surgeons perform minimally invasive procedures for improved recovery times.