According to the results of the CIBERSORT, MCP-counter, and ImmuCellAI methods, we found that the abundances of T cells, CD4+ T cells, follicular helper T (Tfh) cells, and CD8+ T cells in the eutopic endometria of women with endometriosis were higher than those in the endometria of normal controls. Here, CD8A is linked to endometriosis.