Complete remission in leptomeningeal metastasis of NSCLC with rare EGFR-SEPT14 fusion treated with osimertinib combined with intrathecal chemotherapy with pemetrexed.

脑转移 肺癌
作者
Shengnan Zheng,Huiying Li,Jie Feng,Cheng Jiang,Yongjuan Lin,Yu Xie,Tingting Yu,Xiaoping Qian,Zhenyu Yin
出处
期刊:Anti-Cancer Drugs [Lippincott Williams & Wilkins]
标识
DOI:10.1097/cad.0000000000001222
摘要

Leptomeningeal metastasis (LM) is one of the most serious complications of non-small cell lung cancer (NSCLC) without standard treatment guidelines and is always accompanied by poor prognosis. Identifying the types of gene mutations is essential to improve the outcome, and an increasing number of rare epidermal growth factor receptor (EGFR) mutations are revealed by next-generation sequencing (NGS). Here, we describe a case of a 56-year-old man who was diagnosed with lung adenocarcinoma and received thoracoscopic resection in May 2015. One year later, LM was confirmed by positive cerebrospinal fluid cytology. Given the existence of EGFR exon 19 deletions, erlotinib was implemented and achieved a short response for 10 months. Then the systemic therapy was changed to osimertinib and obtained clinical remission for 25 months. Owing to the resurgence of violent headache, retching and vomiting, NGS of cerebrospinal fluid was performed and two rare EGFR-SEPT14 fusions were found. Osimertinib combined bevacizumab, chemotherapy (carboplatin and abraxane) and dacomitinib were implemented in turn but ineffective. Thus, osimertinib combined intrathecal chemotherapy with pemetrexed were carried out and gained a complete remission of neurologic symptoms, stable lesions and long-term survival without notable side effects. This study presented the first case of NSCLC-LM harboring particular EGFR-SEPT14 fusions, who showed a durable response to osimertinib and intrathecal pemetrexed, providing a potential therapeutic option for NSCLC-LM patients with this particular mutation.
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