Suspected cancer not followed up

Hi 

I am a 49,yr old female and have had a lot of ongoing health issues following a stroke. I had a liverscan in November 2023 and a solid mass was reported on my right kidney. I was never informed of this dispite lots of doctors appointments regarding issues with bleeding and urinary problems. I was also sent for a scan as I had pain in my lower tummy again and was sent to a specialist as the doctor suspected a hernia. This was correct but not big enough to have any treatment as it was then bought to my attention 4 months later about my kidney. This is cancer and could have been avoided if my gp followed up on a his issue. I am now going through cancer treatment. I feel this is medical negligence and need some guidance.