Another emerging target is the carcinoembryonic antigen (CEA)-related cell adhesion molecule 5 (CEACAM5), a transmembrane glycoprotein, which presents high expression across multiple tumor types including gastrointestinal, lung, and breast, where it is involved in tumor invasion and metastasis, while its expression is low in normal tissues [52]. The gene discussed is CEACAM5; the disease is neoplasm.