MS 07.06 Which Chemotherapy or Targeted Therapy is Better for Treatment of LCNEC Patients: SCLC-based versus Non-SCLC-based Regimens?

Abstract

Staging of large cell neuroendocrine carcinoma (LCNEC) was classified based on non-small cell type (TNM stage). The treatment of early stage (I, II) was mainly surgery; the use of neo-adjuvant and adjuvant chemotherapy are in consideration but there's not a standard approach; for stage III which limited to the thoracic area, the role of concurrent chemotherapy and radiotherapy is one of the options. Whether the regimen of chemotherapy should be similar to small cell lung cancer (SCLC) or the regimen of non-small cell lung cancer (NSCLC) is not clear. Most of the data are in favor of SCLC regimen which is Cisplatin plus etoposide; however the data came from retrospective and small numbers of patients, thus there's an unmet need to improve the treatment of LCNEC. Large Cell Neuroendocrine Carcinoma and Small Cell Lung Cancer are both consider high grade neuroendocrine carcinoma of the lung. Small cell is the most frequent type of lung neuroendocrine tumor, occurs around 15% of lung cancer while Large Cell neuroendocrine carcinoma was only about 3% of lung cancer. According to WHO classification in 2004 LCNEC was classified as a variant of large-cell carcinoma; however in 2015 WHO classification LCNEC was classified into a group of neuroendocrine tumor which includes SCLC, typical carcinoid, atypical carcinoid and LCNEC. According to genomic analysis, LCNEC was separated into two groups. Some have genomic characteristic of SCLC and some have genomic characteristic of NSCLC. The new modalities such as anti-angiogenesis and in the case of EGFR mutation the treatment with EGFR inhibitor should be considered. The role of met inhibitors in LCNEC should be explored. Thus there is a long way to go in order to improve the outcome of this rare lung cancer type. large cell neuroendocrine carcinoma, chemotherapy regimen