This study is a single-arm, multi-center, two-stage, phase II clinical trial conducted in China. This study adopts Simon's two-stage design, and the inclusion criteria and exclusion criteria of the two stages were consistent. Twelve patients with extrapulmonary neuroendocrine carcinoma will be enrolled in the first stage. If more than four complete or partial responses were seen at planned interim analysis, the additional 16 patients will be recruited in the second stage and a total of 28 patients will be treated.
The purpose of this study is to explore the efficacy and safety of chidamide combined with etoposide and cisplatin/carboplatin in the first-line treatment of advanced extrapulmonary neuroendocrine carcinoma.