Thank you for your reply.

My tumor was discovered during a colonoscopy on July 21, 2021, 5 years after a "clean" colonoscopy on September 2016, which was 3 years after a colonoscopy in May 2013, in which 3 polyps were removed.

I was thought to be a Stage 2b. There were no lymph nodes even visible on my CT Scan or MRI. There was a questionable lesion on my liver that was determined to be a hemangioma. It appeared that the colon was 1 mm away from my rectal wall.

I went with Mayo Clinic's treatment approach of 1 week proton beam radiation (August 28-October 1) followed 3 days later (October 4) with a proctosigmoidectomy with anastamosis and temporary ileostomy.

The surgeon got all clear margins, however 7 out of 29 nodes has some cancer cells, and there were 2 microscopic "nests" in the fat around my rectum, which was all removed during surgery. I had a total of 13 inches of rectum and sigmoid colon removed.

So my oncologist wanted another CT Scan to reassess my stage, as the first CT Scan was back in August. I had this CT Scan Thursday November 11, approximately 5.5 weeks after my surgery. The plan was to start chemotherapy on Friday November 12.

This new CT Scan showed a lesion, approximately 1 cm (.39 inch) on my liver in a different place. This lesion was NOT seen on my CT Scan in August. So now my oncologist has decided to hold off on the chemo until it is determined whether or not this new lesion is a metastases. He is concerned because the lesion was not visible on the earlier CT Scan in August. He has ordered an ultrasound, to see if it will be possible to do an ultrasound guided biopsy of the lesion. If that's not possible, then he will order an MRI.

My ultrasound is scheduled for Monday, November 15.

I am hoping for the slight possibility this new lesion was missed on the first CT Scan due to the "cuts" being at different levels on the two studies, and that is not cancer.