To explore how LSD1 affects the level of tumor-infiltrating CD8+ T cells, expressions of LSD1, CD8, and T-cell attracting chemokines, C-X-C motif chemokine 9 (CXCL9) and C-X-C motif chemokine 10 (CXCL10) were analyzed using IHC on tissue microarray (TMA) blockers constructed with our in-house GC specimens. Here, KDM1A is linked to gastric cancer.