Patient-derived organoids and xenografts were established from a 42-year-old female with HER2-A775_G776YVMA-inserted advanced lung adenocarcinoma…The in vivo PDX model study showed that pyrotinib(mouse,80mg/kg,adopted from clinical trial recommended dose) showed a significantly superior anti-cancer effect than afatinib of 15 mg/kg (p = 0.0471), T-DM1 of 10 mg/kg.