Antitumor activity
Tumors
TUMORS, DISEASE, OESOPHAGEAL SQUAMOUS CELL CARCINOMA
Confirmed objective responses were observed in six patients (ORR, 37.5%; 95% CI, 15.20–64.57); all were partial responses (Table Summary of antitumor activity.Abbreviations: CI, confidence interval; DoR, duration of response; NC, not calculable; OS, overall survival; PFS, progression‐free survival; Q1, lower quartile; Q3, upper quartile; RECIST, Response Evaluation Criteria in Solid Tumors.Includes patients without complete or partial response (according to RECIST 1.1 or unconfirmed), those without stable disease and those who died.Clinical responses and follow‐up period in the ESCC cohort (Part A: Patients 1–6; Part B: Patients 7–16). ESCC, esophageal squamous cell carcinoma.