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Osteosarcoma and other bone cancers
1Division of Oncology, Children's Hospital of Philadelphia, PA 19104, USA.
Abstract:
In this review, recent advances in the clinical therapy of osteosarcoma, including results from the European Osteosarcoma Intergroup trial demonstrating the efficacy of a short intensive two drug protocol are discussed as well the evolving role of ifosfamide. Biologically, the area of interest on chromosome 3q, which may contain an osteosarcoma tumor suppressor gene, is being narrowed, and several promising new therapeutic approaches including tumor vaccine have been explored. In chondrosarcoma research, abnormalities in hereditary multiple exostoses genes, which encode protein products essential for normal cartilage development, and a potential mechanism for the characteristic chemotherapy resistance of cartilaginous tumors (overexpression of P-glycoprotein) have been described. Surgical advances include testing of total en bloc spondylectomy for vertebral tumors as well as a noninvasively extendable long bone endoprosthesis. Finally, new insights in diagnostic imaging, including the evolving role of 201Tl, 99mTc-MIBI (methoxyisobutylisonitrile), and newer variations on magnetic resonance imaging are reviewed.
Insights
This review covers new osteosarcoma treatments, including effective two-drug protocols and ifosfamide. Research also explores chondrosarcoma chemotherapy resistance and advances in surgical and diagnostic imaging techniques for bone tumors.
Area of Science:
- Oncology
- Orthopedic Surgery
- Medical Imaging
Background:
- Osteosarcoma and chondrosarcoma are significant bone cancers requiring novel therapeutic strategies.
- Understanding the genetic underpinnings and molecular mechanisms of these tumors is crucial for treatment development.
- Current treatment modalities face challenges including drug resistance and surgical limitations.
Purpose of the Study:
- To review recent advancements in the clinical therapy of osteosarcoma.
- To discuss progress in chondrosarcoma research, focusing on genetic factors and chemotherapy resistance.
- To highlight innovations in surgical techniques and diagnostic imaging for bone tumors.
Main Methods:
- Review of clinical trial data, particularly the European Osteosarcoma Intergroup trial.
- Analysis of biological research identifying potential tumor suppressor genes and drug resistance mechanisms.
- Evaluation of surgical techniques and advancements in diagnostic imaging modalities.
Main Results:
- Demonstrated efficacy of a short, intensive two-drug protocol for osteosarcoma.
- Narrowing of the critical region on chromosome 3q potentially harboring an osteosarcoma tumor suppressor gene.
- Identification of hereditary multiple exostoses gene abnormalities and P-glycoprotein overexpression in chondrosarcoma.
- Exploration of novel therapeutic approaches like tumor vaccines.
- Advancements in surgical procedures such as total en bloc spondylectomy and extendable endoprostheses.
- Review of evolving roles for diagnostic imaging agents like 201Tl and 99mTc-MIBI, and advanced MRI.
Conclusions:
- Recent clinical trials show promise for intensive chemotherapy regimens in osteosarcoma.
- Genetic research is identifying key pathways and potential targets for osteosarcoma and chondrosarcoma.
- Surgical and imaging innovations are improving the management of bone tumors.
- Continued research into novel therapies and diagnostic tools is essential for improving patient outcomes.