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• W4387207513 abstract "Treatment for high-risk soft tissue sarcoma (STS) of the extremity/trunk includes radiation therapy (RT) and surgical resection. Initial results of a phase 2 single arm trial of 5-day preoperative RT demonstrated acceptable safety and local control. Here we report an update of detailed surgical outcomes among patients treated with 5-day preoperative RT alone on the original phase 2 study, as well as an ongoing expansion cohort.We conducted an updated analysis of surgical complications from a previously reported phase 2 trial of 50 patients with high-risk extremity/trunk STS treated with 5-day preoperative RT (30 Gy over 5 consecutive daily fractions) and surgery. The current analysis includes additional patients from an ongoing IRB-approved expansion cohort of the phase 2 study, which was designed to compare wound complication rates between patients receiving neoadjuvant chemotherapy and those receiving RT alone. However, given that the primary endpoint of this study has not matured, here we present only the data for patients treated with 5-day preoperative RT alone (n = 44; data cutoff date: February 17, 2022). We generated a secure prospective patient database and extracted data including demographic variables, cancer characteristics and surgical outcomes. Minimum post-operative follow-up was 90 days. Statistical analysis was performed using R (v4.2).From a total of 94 patients, mean age was 57 (17-90), 40 (42.5%) were female, 10 (10.6%) were diabetic and 8 patients (8.5%) were active smokers or had a >10 pack-year smoking history. Median follow up was 24 months (IQR 10.6-41.8). The most common histologic diagnosis was undifferentiated pleomorphic sarcoma (n = 38, 40.4%). The most common location was the lower extremity (n = 57, 60.6%). Overall, 26 (27.7%) patients experienced surgical wound complications. In the lower extremity, wound complications occurred in 18 patients (31.6%). In all other sites, wound complications occurred in 8 patients (21.6%) (p = 0.41). Twenty-seven (28.7%) cases required local tissue advancement for primary closure and 12 of these patients (44.4%) experienced a wound complication (p = 0.04). Wound dehiscence occurred in 18 patients at a median duration of 43.5 days (IQR 40.3-85.3) from surgery, comprising 69.2% of all wound complications. Secondary surgical intervention was required in 28 patients (29.8%), of which 7 were oncologic re-excisions and 15 were irrigation and debridement. On multivariate analysis, the use of advancement flaps (OR = 5.39; p = 0.004) and diabetes (OR = 4.08; p = 0.07) were associated with wound complications.Five-day preoperative RT for STS results in rates of wound complications comparable to standard fractionation. We identified local advancement flaps as the primary factor associated with wound complications. STS of the lower extremity that require complex closure warrant close attention for dehiscence." @default.
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• W4387207513 date "2023-10-01" @default.
• W4387207513 modified "2023-10-17" @default.
• W4387207513 title "Surgical Outcomes in Patients Treated with 5-Day Preoperative Radiotherapy for Soft Tissue Sarcoma" @default.
• W4387207513 doi "https://doi.org/10.1016/j.ijrobp.2023.06.2386" @default.
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