As shown in Table 2, tumor purity was associated with poor outcome and CD8+T cells (HR=0.000, 95%CI=0.000-0.111), macrophages (HR=0.000, 95%CI= 0.000-0.138) and Dendritic (HR=8478449.036, 95%CI=0.813-8.844267e+13) might be independent favorable prognostic indicators of PTC patients. Here, CD8A is linked to neoplasm.