The Impact of Perioperative Chemotherapy Timing in Conjunction With Postoperative External-Beam Radiation Therapy on Extremity Soft-Tissue Sarcomas Outcome

The perioperative management of primary extremity soft-tissue sarcomas (ESTS) is multidisciplinary including radiation therapy and chemotherapy (CT). The interplay between these modalities and the relative importance of each remain unclear. Our study aims to determine the relative impact of CT and r...

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Veröffentlicht in:American journal of clinical oncology 2016-10, Vol.39 (5), p.528-534
Hauptverfasser: Mahmoud, Omar, Dosch, Austin, Kwon, Deukwoo, Pitcher, John D, Conway, Sheila, Benedetto, Pasquale, Fernandez, Gustavo, Trent, Jonathan, Temple, H Thomas, Wolfson, Aaron H
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container_end_page 534
container_issue 5
container_start_page 528
container_title American journal of clinical oncology
container_volume 39
creator Mahmoud, Omar
Dosch, Austin
Kwon, Deukwoo
Pitcher, John D
Conway, Sheila
Benedetto, Pasquale
Fernandez, Gustavo
Trent, Jonathan
Temple, H Thomas
Wolfson, Aaron H
description The perioperative management of primary extremity soft-tissue sarcomas (ESTS) is multidisciplinary including radiation therapy and chemotherapy (CT). The interplay between these modalities and the relative importance of each remain unclear. Our study aims to determine the relative impact of CT and radiotherapy on the outcome of ESTS patients treated with limb-sparing surgery. A retrospective review of ESTS registry yielded 97 patients who received neoadjuvant chemotherapy (NCT) and/or adjuvant CT with or without external-beam radiation therapy (EBRT) from January 1, 1999 through December 31, 2009. The cohort comprised 56 males and 41 females whose age at surgery ranged from 17 to 83 years (median, 56 y). Tumor characteristics included the following: 73 lower ESTS; 70 grade 3 lesions; 63 American Joint Committee on Cancer stage III tumors; and 27 lesions with positive microscopic margins. The following outcome parameters were evaluated for the patients' subgroups: overall survival (OS), locoregional control (LRC), and disease-free survival (DFS). EBRT was delivered postoperatively to 81 patients and 49 received CT. Median EBRT dose was 63 Gy (range, 50 to 72 Gy). At median follow-up of 54.6 months, the 5-year OS, LRC, DFS was 68.9%, 87.1%, 66.5%, respectively. On multivariate analysis, positive surgical margins negatively impacted LRC, DFS, and OS (hazard ratio [HR]=10.43, P=0.004), (HR=2.37, P=0.03), (HR=2.26, P=0.038), respectively. EBRT use improved LRC (HR=0.24, P=0.018) and DFS (HR=0.36, P=0.021). The impact of EBRT on DFS was retained (HR=0.28, P=0.006) in the high-grade ESTS subgroup who received CT. The 5-year local failure rate was 6.5%, 28.6%, and 22.2% (P=0.019) for patient receiving NCT, adjuvant chemotherapy, and no CT, respectively. Our data support the use of NCT followed by limb-sparing surgery and adjuvant EBRT in ESTS for local failure reduction with a trend toward improved DFS.
doi_str_mv 10.1097/COC.0000000000000087
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subjects Adolescent
Adult
Aged
Aged, 80 and over
Antineoplastic Combined Chemotherapy Protocols - administration & dosage
Antineoplastic Combined Chemotherapy Protocols - adverse effects
Chemoradiotherapy, Adjuvant - methods
Chemotherapy, Adjuvant - adverse effects
Chemotherapy, Adjuvant - methods
Cisplatin - administration & dosage
Disease-Free Survival
Doxorubicin - administration & dosage
Extremities
Female
Follow-Up Studies
Humans
Ifosfamide - administration & dosage
Male
Margins of Excision
Middle Aged
Neoadjuvant Therapy - adverse effects
Neoplasm Grading
Neoplasm Recurrence, Local - prevention & control
Neoplasm Staging
Neoplasm, Residual
Perioperative Period
Radiotherapy Dosage
Retrospective Studies
Sarcoma - secondary
Sarcoma - therapy
Soft Tissue Neoplasms - pathology
Soft Tissue Neoplasms - therapy
Survival Rate
Treatment Outcome
Young Adult
title The Impact of Perioperative Chemotherapy Timing in Conjunction With Postoperative External-Beam Radiation Therapy on Extremity Soft-Tissue Sarcomas Outcome
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