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PMID (34729013)
Authors Sun N, Zhuang Y, Zhang J, Chen S, Dai Y, Guo R
Title ALK Rearrangement in Small-Cell Lung Cancer and Durable Response to Alectinib: A Case Report.
Journal Vol Issue Date Pages Journal Short Title
OncoTargets and therapy 14 2021 5161-5166 Onco Targets Ther
URL
Abstract Text With the development of next-generation sequencing (NGS), several anaplastic lymphoma kinase (ALK) fusion partner genes have been identified. However, ALK fusion is extremely rare in small cell lung cancer (SCLC), and there is no standard treatment option. Here, we report a patient with SCLC who carried an ALK- Intergenic Region (IR) rearrangement and responded to Alectinib.A 26-year-old man was pathologically diagnosed with extensive-stage SCLC. After 2 cycles of first-line chemotherapy, CT showed a large soft tissue mass in the middle lobe of the right lung and increased liver nodules, left kidney lesions and right kidney lesions. To seek potential therapeutic regimens, ALK rearrangement was identified. The patient achieved a rapid and durable partial response with Alectinib (600 mg BID). The patient experienced a significant clinical response with a progression-free survival of more than 6 months. There were no grade 3 or more adverse events reported, and there was no dose reduction during treatment. Following Alectinib treatment, the allele frequency of ALK rearrangement and RB1 and TP53 mutations in plasma circulating tumor DNA decreased with the reduction in tumor size.This case provides a meaningful reference for the treatment of SCLC patients with ALK rearrangement. This case also provides valuable information on the response to ALK inhibitors in patients with ALK-IR rearrangement and better understanding of ALK-TKI applications in the future.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ALK rearrange lung small cell carcinoma predicted - sensitive Alectinib + Irinotecan Case Reports/Case Series Actionable In a clinical case study, treatment with the combination of Alecensa (alectinib) and Camptosar (irinotecan) resulted in a partial response with progression-free survival lasting longer than 6 months in a small cell lung carcinoma patient harboring an ALK rearrangement (PMID: 34729013). 34729013