Unfortunately, increasing levels of interleukin-6 (IL-6) (25.41 vs 16.03 pg/mL) and carcinoembryonic antigen (CEA) (23.43 vs 7.13 ng/mL) indicated cancer progression, which was confirmed by the presence of multiple metastases in both lungs on CT scan images (Figure 1B). The gene discussed is CEACAM5; the disease is cancer.