Hi, I had a swelling of the lower bile duct which blocked it completely. I saw a specialist who put a stent in and cut into the swelling to do a 4 needle biopsy, which proved negative for cancer. I was sent for a 6-needle biopsy (both endoscopic) and was told I had cancer and needed a whipple re-section which was done. I was then told there was no cancer or changed cells, only scarring and inflammation. Should I sue for negligence?