PT - JOURNAL ARTICLE AU - HIROAKI AKAMATSU AU - YUICHI OZAWA AU - JUN OYANAGI AU - DAICHI FUJIMOTO AU - AKITO HATA AU - NOBUYUKI KATAKAMI AU - KEISUKE TOMII AU - ERIKO MURAKAMI AU - TAKEYA SUGIMOTO AU - TOSHIO SHIMOKAWA AU - YASUHIRO KOH AU - NOBUYUKI YAMAMOTO TI - Phase Ib Study of Osimertinib Plus Ramucirumab in Japanese Lung Cancer Patients With EGFR Mutation AID - 10.21873/anticanres.14844 DP - 2021 Feb 01 TA - Anticancer Research PG - 911--917 VI - 41 IP - 2 4099 - http://ar.iiarjournals.org/content/41/2/911.short 4100 - http://ar.iiarjournals.org/content/41/2/911.full SO - Anticancer Res2021 Feb 01; 41 AB - Background/Aim: To explore the safety of osimertinib plus ramucirumab in patients with EGFR-mutated lung adenocarcinoma. Patients and Methods: Six advanced lung adenocarcinoma patients with EGFR mutation were treated with osimertinib 80 mg/day plus ramucirumab 10 mg/kg, every two weeks. Defined dose-limiting toxicity (DLT) was assessed within the first two treatment cycles. Results: Of those enrolled, five patients had both EGFR exon 20 T790M mutation and sensitizing mutation. DLT was observed in one patient (grade 3 appetite loss). During the entire period, no other severe adverse event was observed. Five patients showed partial response and one disease progression. Median progression-free survival for patients with EGFR T790M was 9.2 months. In an exploratory analysis, changes of cell-free DNA at 2 weeks predicted radiological tumor responses. Conclusion: The safety results of osimertinib plus ramucirumab in Japanese lung adenocarcinoma patients with EGFR mutation will lead to further efficacy investigation.