Long-Term Results of Ewing’s Sarcoma—In a Single Institution

Jae Do Kim, Tae Hun Kim, So Hak Chung

Department of Orthopedic Surgery, Kosin University Gospel Hospital, Busan, Korea.

DOI: 10.4236/jct.2013.41039                

Abstract

Purpose: This study analyzed oncological and functional outcomes of treatment for Ewing’s sarcoma, as well as its significant risk factors through long-term follow up. Objective and Method: Between September 1990 and April 2009, 20 cases that were diagnosed and treated as Ewing’s sarcoma in Kosin University Gospel Hospital were entered onto the study. Mean follow-up period was 45.4 (12 - 108) months. There were 7 cases of male and 13 cases of female, and mean age was 19.9 (5 - 48) years old. Retrospective review was done about treatment outcomes, complications, and significant risk factors. Results: In terms of oncologic results, there were 9 cases of CDF (continuous disease free), 1 case of NED (no evidence of disease), 4 cases of AWD (alive with disease), 5 cases of DOD (dead of disease), and 1 case of DWOD (dead with other disease). Five-year overall survival rate of all the patients was 70.0% and event-free survival rate was 50.0%. The mean MSTS (Musculoskeletal Tumor Society) score was 15.9 (53%) points at last follow-up. Among prognostic factors of age at diagnosis, Enneking stage, size of tumor, site of primary lesion, and distant metastasis, 5-year survival rate of groups without metastasis were 90.9%, nevertheless 44.4% in other group with the metastasis showing statistical significance (p = 0.020). Postoperative complications were 3 cases of infection, each 2 cases of ankylosis and metal failure, and each 1 case of leg length discrepancy, periprosthetic fracture, and local recurrence. Conclusion: Five-year survival rate of this study was similar to that of multicenter studies in America and Europe. Among the prognostic factors, distant metastasis was proven to be most significant. Enneking stage, size of tumor and site of primary lesion are also important and could be statistically significant if with more cases.

Keywords

Ewing’s Sarcoma; Treatment Result; Prognostic Factors

Conflicts of Interest

The authors declare no conflicts of interest.

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