Pathological complete response and long-term survival by pembrolizumab based immunochemotherapy in epidermal growth factor receptor mutated non-small cell lung cancer post-tyrosine kinase inhibitor failure: a case report and tumor microenvironment analysis

Sangtian Liu, Wenhua Liang, Shicui Quan, Qilin Deng, Wenhai Fu, Yalei Zhang, Hong Du, Jianxing He