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Efficacy of Neoadjuvant Chemotherapy for Synovial Sarcoma: Retrospective Analysis of a Nationwide Database in Japan
Akira Kawai
Corresponding Author
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Background
Synovial sarcoma is an aggressive but chemosensitive soft-tissue tumor. We retrospectively analyzed the efficacy of neoadjuvant chemotherapy for synovial sarcoma with data from the nationwide database, Bone and Soft Tissue Tumor Registry in Japan.
Methods
This study included 316 patients diagnosed with synovial sarcoma between 2006 and 2012. Oncologic outcomes were analyzed using a Cox-hazard regression model. The effects of neoadjuvant chemotherapy on outcomes were evaluated using a matched-pair analysis. The oncologic outcomes of patients who did or did not receive neoadjuvant chemotherapy were compared (cx+ and cx-).
Results
Multivariate analysis revealed significant correlations of distant postoperative metastasis (hazard ratio [HR] = 0.01, p<0.001) with overall survival; surgical margin type (marginal resection, HR=0.12, p=0.011 and intralesional resection, HR=0.08, p=0.022 versus wide resection) with local recurrence; and postoperative local recurrence (HR=0.30, p=0.027) and surgical margin (marginal resection, HR=0.31, p=0.023 versus wide resection) with distant relapse-free survival.
Before propensity score matching, neoadjuvant chemotherapy was mainly administered for the patients with younger age, deeper tumor locations, larger tumors, more advanced-stage disease, and monophasic-type disease. The 3-year overall survival rates, local control rates and distant relapse-free survival rates were 82.9% / 80.7% (HR = 0.79, p = 0.102), 91.2% / 89.8% (HR = 1.04, p = 0.837) and 76.6% / 75.0% (HR = 0.76, p = 0.307) in the cx+/cx- groups, respectively. After propensity score matching, 172 patients were selected such that the patient demographics were nearly identical for both the groups. The 3-year overall survival rates, local control rates and distant relapse-free survival rates were 80.8% / 81.4% (HR = 0.83, p = 0.563), 93.2% / 89.4% (HR = 0.83, p = 0.491) and 76.9% / 78.7% (HR = 1.01, p = 0.982) in the cx+ and cx- group, respectively.
Conclusion
This large-sample study indicated that the margin status and postoperative disease control were associated directly or indirectly with improved oncologic outcomes. However, the efficacy of neoadjuvant chemotherapy for survival outcomes in synovial sarcoma patients was not proven.
Keywords
Neoadjuvant therapy, chemotherapy, soft-tissue sarcoma, synovial sarcoma, database study, matched-pair analysis
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On 18 Jun, 2020
Reviewer #2 agreed
On 16 Jun, 2020
Review #1 received
Received 09 Jun, 2020
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On 04 Jun, 2020
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On 17 May, 2020
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This preprint is under consideration at BMC Cancer. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Efficacy of Neoadjuvant Chemotherapy for Synovial Sarcoma: Retrospective Analysis of a Nationwide Database in Japan
Akira Kawai
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Revision
Version 1
Posted 27 May, 2020
No community comments so far
Editorial decision: Major revision
On 17 Jul, 2020
Review #3 received
Received 10 Jul, 2020
Review #2 received
Received 30 Jun, 2020
Reviewer #3 agreed
On 18 Jun, 2020
Reviewer #2 agreed
On 16 Jun, 2020
Review #1 received
Received 09 Jun, 2020
Reviewers invited
Invitations sent on 04 Jun, 2020
Reviewer #1 agreed
On 04 Jun, 2020
Editor assigned
On 18 May, 2020
Submission checks complete
On 17 May, 2020
Editor invited
On 17 May, 2020
First submitted
On 14 May, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
Synovial sarcoma is an aggressive but chemosensitive soft-tissue tumor. We retrospectively analyzed the efficacy of neoadjuvant chemotherapy for synovial sarcoma with data from the nationwide database, Bone and Soft Tissue Tumor Registry in Japan.
Methods
This study included 316 patients diagnosed with synovial sarcoma between 2006 and 2012. Oncologic outcomes were analyzed using a Cox-hazard regression model. The effects of neoadjuvant chemotherapy on outcomes were evaluated using a matched-pair analysis. The oncologic outcomes of patients who did or did not receive neoadjuvant chemotherapy were compared (cx+ and cx-).
Results
Multivariate analysis revealed significant correlations of distant postoperative metastasis (hazard ratio [HR] = 0.01, p<0.001) with overall survival; surgical margin type (marginal resection, HR=0.12, p=0.011 and intralesional resection, HR=0.08, p=0.022 versus wide resection) with local recurrence; and postoperative local recurrence (HR=0.30, p=0.027) and surgical margin (marginal resection, HR=0.31, p=0.023 versus wide resection) with distant relapse-free survival.
Before propensity score matching, neoadjuvant chemotherapy was mainly administered for the patients with younger age, deeper tumor locations, larger tumors, more advanced-stage disease, and monophasic-type disease. The 3-year overall survival rates, local control rates and distant relapse-free survival rates were 82.9% / 80.7% (HR = 0.79, p = 0.102), 91.2% / 89.8% (HR = 1.04, p = 0.837) and 76.6% / 75.0% (HR = 0.76, p = 0.307) in the cx+/cx- groups, respectively. After propensity score matching, 172 patients were selected such that the patient demographics were nearly identical for both the groups. The 3-year overall survival rates, local control rates and distant relapse-free survival rates were 80.8% / 81.4% (HR = 0.83, p = 0.563), 93.2% / 89.4% (HR = 0.83, p = 0.491) and 76.9% / 78.7% (HR = 1.01, p = 0.982) in the cx+ and cx- group, respectively.
Conclusion
This large-sample study indicated that the margin status and postoperative disease control were associated directly or indirectly with improved oncologic outcomes. However, the efficacy of neoadjuvant chemotherapy for survival outcomes in synovial sarcoma patients was not proven.
Figure 1
Figure 2