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Primary high-grade osteosarcoma: comparison between preadolescent and older patients
Gaetano Bacci1, Alessandra Longhi, Franco Bertoni
1Department of Chemotherapy, Istituti Ortopedici Rizzoli, Bologna, Italy. gaetano.bacci@ior.it
Journal of Pediatric Hematology/Oncology
|March 8, 2005
Summary
Preadolescent osteosarcoma (bone cancer) shows similar biology and prognosis to that in older patients. This finding suggests that current therapies are equally effective for both pediatric and adolescent bone cancer patients.
Area of Science:
- Pediatric Oncology
- Orthopedic Oncology
- Cancer Biology
Background:
- Osteosarcoma is a common bone cancer primarily affecting children and young adults.
- Previous studies have suggested potential differences in osteosarcoma biology and prognosis between preadolescent and adolescent patients.
- Understanding these differences is crucial for tailoring effective treatment strategies.
Purpose of the Study:
- To investigate whether osteosarcoma in preadolescent patients exhibits different biological characteristics compared to older patients.
- To determine if preadolescent osteosarcoma patients have a worse prognosis than their older counterparts.
- To compare epidemiologic features, treatment response, and relapse patterns between these two age groups.
Main Methods:
- Retrospective review of medical records from 1,603 high-grade osteosarcoma patients treated between 1972 and 1999.
- A subgroup analysis of 1,136 patients with nonmetastatic extremity osteosarcoma receiving identical chemotherapy protocols.
- Comparison of survival rates, amputation rates, relapse patterns, metastasis sites, and histologic response between preadolescent and older patient groups.
Main Results:
- Preadolescent patients were more frequently female and had tumors predominantly located in the extremity.
- No significant differences were observed in 5-year event-free survival (60% vs. 58%), overall survival (67% vs. 65%), or amputation rates (24% vs. 25%).
- Patterns of relapse, including time, type, site of first metastases, and histologic response to treatment, were similar between the age groups.
Conclusions:
- Osteosarcoma in preadolescent patients does not appear to have a different biology or a worse prognosis compared to older patients.
- Epidemiologic characteristics show some differences, but these do not translate into distinct clinical outcomes.
- Current treatment protocols for osteosarcoma can be applied uniformly across preadolescent and older patient populations.