Effectiveness of afatinib after ineffectiveness of gefitinib in an advanced lung adenocarcinoma patient with a single EGFR exon 20 S768I mutation: a case report

Hua Duan1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Yanmei Peng1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Huijuan Cui2 Department of Oncology, China– Japan Friendship Hospital, Chaoyang, Beijing, ChinaCorrespondence[email protected]

Yuqin Qiu1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Qiang Li1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Jingyi Zhang1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Wen Shen1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Chenyao Sun1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

Chufan Luo1 Department of China–Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China

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