[P42] Poster Session 42　Gastrointestinal Cancer（Esophageal Cancer 2）

[P42-1] Correlation of PD-L1 expression and clinical efficacy for advanced ESCC treated with nivolumab monotherapy

^○Hayato Mikuni^1,2, Shun Yamamoto¹, Ryoichi Sawada², Yoshitaka Honma¹, Shigeki Sekine³, Koshiro Ishiyama⁴, Junya Oguma⁴, Masayuki Saruta², Hiroyuki Daiko⁴, Ken Kato¹ (1.Department of Head and Neck, Esophageal Medical Oncology, National Cancer Center Hospital, 2.Department of Gastroenterology and Hepatology, Jikei University Hospital, 3.Department of Diagnostic Pathology, National Cancer Center Hospital, 4.Department of Esophageal Surgery, National Cancer Center Hospital)