I have signet ring cells and do not have Lynch Syndrome. Signet ring cells are unmistakeable under a microscope. They are named for exactly what they look like. A circle with the nucleus on top. Looks just like a ring. However, I could not say for sure if someone had a greater chance of having Lynch Syndrome if they had signet cells or signet cells if they had Lynch Syndrome. Even though I do not have Lynch Syndrome my children are able to have colonoscopy's 10 years before my diagnosis. So since I was diagnosed at age 41 they can start getting tested at age 31. Even if you (or your family member) does not have Lynch Syndrome colon cancer can still run in families.
8/11CRC Stage 4 Nodes KRAS+ Signet Cells
"It will be said that she stood in the storm, and when the wind did not blow her way, and surely it had not, she ajusted her sails" Liz Edwards