Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

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Gewählte Publikation:

Maisel, F.
Benefit of metastasectomy in renal cell carcinoma patients with metachronous metastasis: A propensity score analysis
Humanmedizin; [ Diplomarbeit ] Graz Medical University; 2021. pp. 81 [OPEN ACCESS]


Autor*innen der Med Uni Graz:
Pichler Martin
Posch Florian

Introduction: Metastasectomy is a frequently practiced treatment strategy in metastatic renal cell carcinoma (mRCC). However, the magnitude of benefit of metastasectomy as compared to medical treatment alone is currently unclear. Methods: We therefore conducted a propensity score analysis of overall survival (OS) in 106 mRCC patients with metachronous metastasis, of whom 36 (34%) were treated with metastasectomy and 70 (66%) with medical therapy alone. Results: The most frequent metastasectomy procedures were lung resections (n=13) and craniotomies (n=6). Median time-to-progression after metastasectomy was 0.7 years [25th-75th percentile: 0.3-2.7]. After a median follow-up (FU) of 6.2 years and 63 deaths, 5-year OS estimates were 41% and 22% in the metastasectomy and medical therapy group, respectively (log-rank p=0.00007; Hazard ratio (HR)=0.38, 95%CI: 0.21-0.68). Patients undergoing metastasectomy had a significantly higher prevalence of favourable prognostic factors, such as fewer bilateral lung metastases and longer disease-free intervals between nephrectomy and metastasis diagnosis. After propensity score weighting for these differences and adjusting for immortal time bias, the favourable association between metastasectomy and OS became much weaker (HR=0.62, 95%CI: 0.39-1.00, p=0.050). Propensity-score-weighted 5-year OS estimates were 24% and 20% in the metastasectomy and medical therapy group, respectively (log-rank p=0.001). In exploratory analyses, the benefit of metastasectomy was confined to patients who achieved complete resection of all known metastases. Conclusion: Within the limitations of an observational study, these findings support the concept that metastasectomy is associated with an OS benefit in patients with mRCC. Metastasectomies not achieving complete resection of all known lesions are likely without OS benefit.

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