PTGS2 and neoplasm: This association included annexin genes, S100A10, S100A6, PTGER1, PTGER2, PTGS2, TBXA2R, AKR1C3, and HPGD. Prostaglandin E2 (PGE2) can promote tumor growth by binding to its receptors and activating signaling pathways that control cell proliferation, migration, apoptosis, or angiogenesis.27