That happened with my dad and colon cancer. They misread his first upper and lower GI xray, then 6 months later they ruined the next one in developing, he was finally diagnosed and went to the University of Penn for surgery where they left a sponge in him that turned septic.
Oh my goodness! That's terrible! I hope you got a settlement for that!
My aunt just passed away from having a colonoscopy. They punctured her intestine in 3 places. She got very sick. She went into the hospital and they fixed one the first time, but she got sick again and had to go back in for a second surgery but by that time her kidneys started to fail and they couldn't get her well.