Background Antiangiogenic drugs have shown initial efficacy in the treatment of advanced thymic carcinomas (TCs); however, data are limited. In this study, we provide real-world data relating to the efficacy of antiangiogenic drugs for the treatment of patients with TCs. Methods We retrospectively collected data on clinical progress after first-line chemotherapy in TCs patients who were treated with small molecule antiangiogenic drugs at our institution between January 2010 and December 2021. Tumor response was evaluated according to version 1.1 of the Response Evaluation Criteria in Solid Tumors. Progression free survival and overall survival were calculated using the Kaplan-Meier method. Results Of the 17 patients enrolled, 13 (76.5%) received apatinib and four (23.5%) anlotinib monotherapy with an objective response rate of 23.5%. Eleven (64.7%) patients had stable disease. The median follow-up period was 46.0 months (95% confidence interval [CI], 33.0–59.0 months). The median progression survival and overall survival were 7.9 months (95% CI, 6.5–9.3) and 47.0 months (95% CI, 35.4–58.6), respectively. In the 13 patients receiving apatinib, the median PFS was 7.0 months (95% CI, 5.0–9.0), compared with 8.0 months (95% CI, 2.7–13.3 months) for patients in the anlotinib group (P = 0.945). The most common grade 3 adverse events (AEs) were hypertension (n = 3, 23.1%), followed by proteinuria and hand-foot syndrome (HFS, n = 2, 15.4%). There were no grade 4 AEs although eight patients (47.1%) required mid-course discontinuation. Conclusion For refractory TCs, small molecule antiangiogenic drugs are efficacious as second- or post-line treatments. The toxicity of antiangiogenic therapy is manageable.
The incidence of primary and acquired BRAF mutations is low in non‐small cell lung cancer (NSCLC), with limited demographic and treatment outcome data available for this patient population. We evaluated lung cancer samples with programmed cell death ligand 1 (PD‐L1) information extracted from 12 051 cases (cohort A) of lung cancer from OncoPanscan™‐based sequencing of tissue (Genetron Health) and conducted retrospective multicenter data analysis using the database of Zhejiang Cancer Hospital and four other centers (cohort B, including 73 primary BRAF mutation and 14 acquired BRAF mutation cases) to compare treatment outcomes of patient groups with primary and acquired BRAF mutations. In cohort A, after propensity score analysis, 165 samples of NSCLC with BRAF mutations were screened along with 165 paired non‐BRAF mutation samples. We observed no significant differences in the proportion of samples with ≥1% PD‐L1 between BRAF and non‐BRAF mutant groups. The median progression‐free survival (mPFS) period in 13 patients with primary BRAF mutations receiving BRAF tyrosine kinase inhibitors (BRAF‐TKIs) was 7.0 months. The group with primary BRAF mutations receiving immune checkpoint inhibitor (ICI) combination chemotherapy had better PFS than those administered ICI monotherapy (14.77 months vs. 5.0 months, p = 0.025) and similar results were obtained for OS (unreached vs. 20.3 months, p = 0.013). For acquired BRAF mutations, mPFS of BRAF‐TKI, ICI‐based, and chemotherapy‐based regimens were 3.8, 1.5, and 1.9 months, respectively. Therefore, for patients with the primary BRAF V600E mutation, targeted therapy or immunochemotherapy could serve as effective treatment choices, while for those with acquired BRAF V600E, targeted drug therapy may remain the preferred solution in China.
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