Mario, I’m not a doctor but I had I had an IPMN cyst removed from the tail of my pancreas in January. Before that I had an EUS/FNA. CEA measurements indicate If your cyst has mucin in it or not. It doesn’t tell you whether or not you have cancer. A high CEA from the cyst itself means the cyst has mucin in it. A low CEA means your dealing with another type of cyst. It really doesn’t matter the CEA number. I believe if it’s over 192 then it’s considered elevated. Mine was in the thousands but I didn’t have cancer. I had high grade dysplasia. I think you might be confusing to CEA levels in the actual cyst verses CA 19-9 which i believe is a blood test to search for pancreatic cancer