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Τρίτη 5 Ιουνίου 2018

Multimodality Treatment of Desmoplastic small round cell tumor: Chemotherapy and Complete Cytoreductive Surgery Improve Patient Survival

Purpose Desmoplastic small round cell tumor (DSRCT), which harbors EWSR1-WT1 t(11;22)(p13:q12) chromosomal translocation, is an aggressive malignancy that typically presents as intra-abdominal sarcomatosis in young males. Given its rarity, optimal treatment has not been defined. Experimental Design We conducted a retrospective study of 187 DSRCT patients treated at MD Anderson Cancer Center over two decades. Univariate and multivariate regression analyses were performed. We determined whether chemotherapy, complete cytoreductive surgery (CCS), hyperthermic intraperitoneal cisplatin (HIPEC), and/or whole abdominal radiation (WART) improve overall survival in DSRCT patients. Critically, since our institutional practice limits HIPEC and WART to patients with less extensive, potentially resectable disease that had benefited from neoadjuvant chemotherapy, a time-variant analysis was performed to evaluate those adjunct treatment modalities. CONCLUSIONS Improved 3- and 5-year overall survival were observed following multidisciplinary treatment that includes ES-based chemotherapy and complete tumor cytoreductive surgery, but few if any patients are cured. Prospective randomized studies will be required to prove whether HIPEC or WART are important. In the meantime, chemotherapy and CCS remain the cornerstone of treatment and provide a solid foundation to evaluate new biologically targeted therapies.



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