Outcome and predictive factors in uterine carcinosarcoma using postoperative radiotherapy: a Rare Cancer Network study.

Autor: Zwahlen, Daniel R., Schick, Ulrike, Bolukbasi, Yasemin, Thariat, Juliette, Abdah-Bortnyak, Roxolyana, Kuten, Abraham, Igdem, Sefik, Caglar, Hale, Ozsaran, Zeynep, Loessl, Kristina, Belkaaloul, Kaouthar Khanfir, Villette, Sylviane, Vees, Hansjörg
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Zdroj: Rare Tumors; 2016, Vol. 8 Issue 2, p42-48, 7p
Abstrakt: Uterine carcinosarcomas (UCS) are rare tumors. Consensus regarding therapeutic management in non-metastatic disease is lacking. This study reports on outcome and predictive factors when using postoperative radiotherapy. We analyzed a retrospective analysis in 124 women treated between 1987-2007 in the framework of the Rare-Cancer-Network. Median follow-up was 27 months. Postoperative pelvic EBRT was administered in 105 women (85%) and 92 patients (74%) received exclusive or additional vaginal brachytherapy. Five-year overall survival (OS), disease-free survival (DFS), cancer specific survival (CSS) and locoregional control (LRC) were 51.6% (95% CI 35-73%), 53.7% (39-71%), 58.6% (38-74%) and 48% (38-67%). Multivariate analysis showed that external beam radiation therapy (EBRT) >50Gy was an independent prognostic factor for better OS (P=0.03), CSS (P=0.02) and LRC (P=0.01). Relative risks (RR) for better OS (P=0.02), DFS (P=0.04) and LRC (P=0.01) were significantly associated with younger age (≤60 years). Higher brachytherapy (BT)-dose (>9Gy) improved DFS (P=0.04) and LRC (P=0.008). We concluded that UCS has high systemic failure rate. Local relapse was reduced by a relative risk factor of over three in all stages of diseases when using higher doses for EBRT and brachytherapy. Postoperative RT was most effective in UCS stage I/II-diseases. [ABSTRACT FROM AUTHOR]
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