496. THE OUTCOMES OF NIVOLUMAB FOR ESOPHAGEAL CANCER RECURRENT PATIENTS AFTER NAC-DCF THERAPY

Cancer immune therapy is the most prominent topic in esophageal cancer. The attraction-3 trial showed that nivolumab was associated with a significant improvement in overall survival versus chemotherapy. This trial was well designed, including patients unresectable, after surgery, and after chemoradiotherapy. However, there are few reports limited to the recurrence after surgery. Here we report the outcome of Nivolumab for the recurrence after surgery with docetaxel, cisplatin, and 5-FU neoadjuvant chemotherapy (NAC-DCF). The subjects were esophageal cancer recurrent patients after NAC-DCF, except for the cases performed only best supportive care, in Okayama University Hospital between January 2014 and October 2021, excepted the cases performed only best supportive care. We assessed their background characteristics, treatment details, immune-related adverse events (irAE), and overall survival (OS). 17 patients received therapies, including Nivolumab (Nivo). 41 patients received other chemotherapies (Control). There was no significant difference in gender (Nivo: male 88%, Control male 80%), age (Nivo: 68.1±8.9, Control: 65.1±5.6), and the period from surgery to recurrence (Nivo: 5.7±3.8 months, Control: 6.1±3.7 months). The Median overall survivals were 27±7.0 months and 18±2.5 months (P=0.055, Log Rank test). The major irAEs were reported in 4 cases (ACTH deficiency: 1 event, enterocolitis: 1 event, liver dysfunction: 2 events). Nivolumab improved the outcomes of recurrent patients after NAC-DCF with a bit of tendency.