Over half of all bowel cancer patients in Wales are diagnosed when the cancer is at an advanced stage which makes it harder to treat, manage and cure.
Mae mwy na hanner y cleifion sy’n dioddef o ganser y coluddyn yng Nghymru yn cael diagnosis pan fydd y canser wedi datblygu, sy’n ei wneud yn anoddach i’w drin, ei reoli a’i wella.