PMID- 34376997 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210812 IS - 1178-6930 (Print) IS - 1178-6930 (Electronic) IS - 1178-6930 (Linking) VI - 14 DP - 2021 TI - Acquired ALK Resistance Mutations Identified from Liquid Biopsy in an ALK-Rearranged Squamous Cell Lung Cancer Patient Treated with Sequential ALK TKI Therapy: A Case Report. PG - 4329-4333 LID - 10.2147/OTT.S315832 [doi] AB - Anaplastic lymphoma kinase (ALK) rearrangement is extremely rare in lung squamous cell carcinoma (LSCC), and it remains controversial as to whether LSCC patients with ALK rearrangement can benefit from ALK tyrosine kinase inhibitors (TKIs). Here, we report an LSCC patient with ALK rearrangement who was treated with sequential ALK TKI therapies and experienced a clinical benefit of 35 months. Although the use of ALK TKIs showed clinical benefits, targeted next-generation sequencing (NGS) for dynamic monitoring of circulating tumor DNA (ctDNA) from patient plasma revealed the accumulation of ALK resistance mutations, which could provide valuable information in designing the treatment strategy. Our study highlights the importance of dynamic monitoring of ctDNA using NGS to discover tumor evolution to guide treatment decision-making and provides meaningful insights into the potential treatment options for ALK-positive LSCC patients. CI - (c) 2021 Yao et al. FAU - Yao, Bin AU - Yao B AD - Department of Radiotherapy and Chemotherapy, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, People's Republic of China. FAU - Han, Xue AU - Han X AD - Department of Research and Development, Nanjing Geneseeq Technology Inc., Nanjing, Jiangsu, People's Republic of China. FAU - Pang, Linrong AU - Pang L AD - Department of Radiotherapy and Chemotherapy, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, People's Republic of China. FAU - Xu, Caihong AU - Xu C AD - Department of Radiotherapy and Chemotherapy, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, People's Republic of China. FAU - Liu, Sisi AU - Liu S AD - Department of Research and Development, Nanjing Geneseeq Technology Inc., Nanjing, Jiangsu, People's Republic of China. FAU - Cheng, Xiaochun AU - Cheng X AD - Department of Radiotherapy and Chemotherapy, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, People's Republic of China. FAU - Chen, Jun AU - Chen J AD - Department of Radiotherapy and Chemotherapy, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, People's Republic of China. LA - eng PT - Case Reports DEP - 20210803 PL - New Zealand TA - Onco Targets Ther JT - OncoTargets and therapy JID - 101514322 PMC - PMC8349191 OTO - NOTNLM OT - ALK rearrangement OT - dynamic monitoring OT - next-generation sequencing OT - resistance mutation COIS- Xue Han and Sisi Liu are employees of Nanjing Geneseeq Technology Inc., China. The authors report no other conflicts of interest to declare. EDAT- 2021/08/12 06:00 MHDA- 2021/08/12 06:01 PMCR- 2021/08/03 CRDT- 2021/08/11 06:34 PHST- 2021/04/14 00:00 [received] PHST- 2021/07/21 00:00 [accepted] PHST- 2021/08/11 06:34 [entrez] PHST- 2021/08/12 06:00 [pubmed] PHST- 2021/08/12 06:01 [medline] PHST- 2021/08/03 00:00 [pmc-release] AID - 315832 [pii] AID - 10.2147/OTT.S315832 [doi] PST - epublish SO - Onco Targets Ther. 2021 Aug 3;14:4329-4333. doi: 10.2147/OTT.S315832. eCollection 2021.