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Undetectable pre‐radical cystectomy circulating tumour DNA status predicts improved oncological outcomes
BJU International ( IF 3.7 ) Pub Date : 2024-10-17 , DOI: 10.1111/bju.16556
Reuben Ben‐David, Sarah Lidagoster, Jack Geduldig, Kaushik P. Kolanukuduru, Yuval Elkun, Neeraja Tillu, Asher Mandel, Mohammed Almoflihi, Basil Kaufmann, Kyrollis Attalla, Reza Mehrazin, Peter Wiklund, John P. Sfakianos

ObjectiveTo assess recurrence‐free survival (RFS) in patients with undetectable tumour‐informed circulating tumour DNA (ctDNA) before radical cystectomy (RC) and evaluate if those who converted from detectable to undetectable ctDNA status after RC have similar RFS outcomes as those with persistently undetectable ctDNA status.Patients and MethodsPatients who underwent RC had prospectively and longitudinally collected tumour‐informed ctDNA analyses during 2021–2023. ctDNA status was informed from the pre‐RC specimen. The minimal residual disease (MRD) window was defined as the initial 90 days after RC. RFS was evaluated using the Kaplan–Meier method. Cox regression analysis was performed to find predictors of disease recurrence.ResultsThe cohort included 135 patients with 647 ctDNA analyses. The median (interquartile range [IQR]) age was 71 (63–77) years. Over a median (IQR) follow‐up of 11 (7–18) months, 41 patients (30%) had a recurrence. Pre‐RC undetectable ctDNA status was found in 54 patients (40%). The RFS rates at 6, 12, and 21 months were 98%, 93%, and 82%, respectively. Of 77 patients with undetectable ctDNA status at the MRD window available for conversion dynamics analysis, 43 had persistently undetectable ctDNA status (both at pre‐RC and MRD window) and 31 converted from pre‐RC detectable to MRD undetectable status (conversion group). The persistently undetectable group had significantly better RFS than the conversion group (log‐rank, P < 0.001), with 12‐month RFS rates of 97% vs 51%, and 18‐month RFS rates of 88% vs 51%, respectively. On Cox multivariate analysis, only the conversion group status predicted disease recurrence.ConclusionsPatients with undetectable pre‐RC ctDNA status have a favourable prognosis and may be candidates for treatment de‐escalation. Those with persistently undetectable ctDNA had superior RFS compared to the conversion group. Pre‐RC ctDNA status should be incorporated into trials examining ctDNA use in clinical decision‐making.

中文翻译:


根治性膀胱切除术前检测不到的循环肿瘤 DNA 状态预示着肿瘤学结局的改善



目的评估根治性膀胱切除术 (RC) 前无法检测到肿瘤的循环肿瘤 DNA (ctDNA) 患者的无复发生存期 (RFS),并评估 RC 后从可检测 ctDNA 状态转换为无法检测 ctDNA 状态的患者是否具有与持续检测不到 ctDNA 状态的患者相似的 RFS 结局。患者和方法接受 RC 的患者在 2021-2023 年期间进行了前瞻性和纵向收集的肿瘤知情 ctDNA 分析。ctDNA 状态是从 RC 前标本中获知的。微小残留病 (MRD) 窗口定义为 RC 后的初始 90 天。使用 Kaplan-Meier 方法评估 RFS。进行 Cox 回归分析以寻找疾病复发的预测因子。结果该队列包括 135 例患者,进行了 647 次 ctDNA 分析。中位 (四分位距 [IQR])年龄为 71 (63-77) 岁。在 11 (7-18) 个月的中位 (IQR) 随访中,41 名患者 (30%) 复发。在 54 例患者 (40%) 中发现了 RC 前检测不到的 ctDNA 状态。6 、 12 和 21 个月的 RFS 率分别为 98% 、 93% 和 82%。在 77 例在 MRD 窗口无法检测到 ctDNA 状态的患者中,可用于转换动力学分析,43 例具有持续检测不到的 ctDNA 状态(在 RC 前和 MRD 窗口),31 例从 RC 前可检测转换为 MRD 无法检测状态(转换组)。持续检测不到组的 RFS 显著优于转换组 (log-rank, P < 0.001),12 个月 RFS 率分别为 97% 和 51%,18 个月 RFS 率分别为 88% 和 51%。在 Cox 多变量分析中,只有转换组状态预测疾病复发。结论检测不到 RC 前 ctDNA 状态的患者预后良好,可能适合治疗降级。与转化组相比,那些持续检测不到 ctDNA 的人具有更高的 RFS。RC 前 ctDNA 状态应纳入检查 ctDNA 在临床决策中的使用情况的试验中。
更新日期:2024-10-17
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