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Osteosarcoma: The COSS Experience

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Part of the book series: Cancer Treatment and Research ((CTAR,volume 152))

Abstract

COSS, the interdisciplinary Cooperative German–Austrian–Swiss Osteosarcoma Study Group, was founded in 1977 and has since registered some 3,500 bone sarcoma patients from over 200 institutions. For the purpose of the Pediatric and Adolescent Osteosarcoma Conference in Houston, March 2008, the outcomes of 2,464 consecutive patients with high-grade central osteosarcoma, who had been diagnosed between 1980 and 2005 and had been treated on neoadjuvant COSS protocols, were reviewed. Intended treatment had included surgery and multidrug chemotherapy, with high-dose methotrexate, doxorubicin, cisplatin, and ifosfamide being used in most protocols. After a median follow-up of 7.31 years for 1,654 survivors, 5- and 10-year survival estimates were 0.748/0.695 for 2,017 patients with localized extremity tumors and 0.369/0.317 for 444 patients with axial tumors or/and primary metastases, respectively. Tumor response to preoperative chemotherapy was of independent prognostic significance. Over the years, there was a major shift from amputation towards limb-salvage. This development was least evident for patients below the age of 10. While survival expectancies improved from the first to the second half of the recruitment period, no further improvement was evident within the latter period. In the manuscript, the results described above are discussed based on the findings of the previous analyses of our group.

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Acknowledgements

We thank all the patients who contributed to the COSS studies, and acknowledge the physicians, nurses, data managers, and support staff of the collaborating centers for their active participation, and the Deutsches Kinderkrebsregister for the exchange of follow-up information and data on secondary malignancies. We particularly appreciate the dedicated work of the staff of the COSS study center and of the members of the COSS reference panels. The COSS studies on which these analyses are based received support from Deutsche Krebshilfe, Bundesministerium für Forschung und Technologie, and Fördergemeinschaft Kinderkrebszentrum Hamburg.

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Correspondence to Stefan Bielack .

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Bielack, S. et al. (2009). Osteosarcoma: The COSS Experience. In: Jaffe, N., Bruland, O., Bielack, S. (eds) Pediatric and Adolescent Osteosarcoma. Cancer Treatment and Research, vol 152. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-0284-9_15

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  • DOI: https://doi.org/10.1007/978-1-4419-0284-9_15

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