CEACAM3 and breast cancer: Results from qPCR analysis using human tissue cDNA arrays (Table 2) showed that full-length CEA transcript was commonly detected (Ct≤30) in pancreatic adenocarcinomas (4 of 5), colon (41 of 42), gastroesophageal (38 of 42), lung (39 of 40), and breast cancers (38 of 41) of various grades and stages.