To date, five genotypes have been reported. In this study, we examined tumor samples obtained from Korean lung cancer patients to determine the MCyV NCCR. The prevalence rates for MCPyV NCCR genotypes in Korean patients with NSCLC were 27.3% (41 of 150) for all identified genotypes, 21.3% (32 of 150) for subtype I, and 6% (9 of 150) for subtype IIc (Table 4 and Figure 4), with no other genotypes detected.