Furthermore, fluzoparib, one of the PARPis, caused the accumulation of DNA damage, and LMO2 deficiency reduced the sensitivity of NKTCL cells to PARPis. Additionally, NKTCL patients with high LMO2 expression may have better progression-free survival and overall survival. Finally, the combination of fluzoparib and cisplatin exhibited significant synergistic effects both in vitro and in vivo.