(37) found that serum EBV capsid antigen IgA (EBV VCA-IgA) levels in CTC-positive NPC patients were higher than those in CTC-negative NPC patients, and CTC enumeration was positively correlated with the EBV DNA load and EBV VCA-IgA levels. The gene discussed is CD79A; the disease is nasopharyngeal carcinoma.