The maximally selected log-rank analysis revealed that CD8 cell counts (p = 0.04) may potentially be related to overall survival, while lymphocyte-to-monocyte ratio (p = 0.02), platelet-to-lymphocyte ratio (p = 0.03), CD3 cell counts (p = 0.01), and CD8 cell counts (p < 0.01) could be potentially linked with progression-free survival in breast cancer patients affected by HIV. The gene discussed is CD8A; the disease is breast carcinoma.