Control of primary osteosarcoma with chemotherapy

Area of Science:

• Oncology
• Pharmacology

Background:

• Osteosarcoma is a primary bone cancer often requiring aggressive treatment.
• High-dose methotrexate with citrovorum factor rescue (MTX-CF) is a chemotherapy regimen used in various cancers.

Observation:

• Three osteosarcoma patients achieved complete primary tumor response with initial MTX-CF.
• Sustained response was observed with combined MTX-CF, intra-arterial cisplatin (CDP), and doxorubicin.
• Local recurrence occurred in two patients after treatment discontinuation.

Findings:

• Reinstatement of MTX-CF led to complete response in one relapsed patient.
• The second relapsed patient achieved remission with radiation and intra-arterial CDP, followed by intravenous chemotherapy.
• The non-relapsed patient maintained a complete response for over 42 months.
• All patients remained free of pulmonary metastases for over 40 months.

Implications:

• MTX-CF, in combination with other agents like CDP, demonstrates efficacy in treating osteosarcoma.
• Salvage chemotherapy regimens can be effective in managing relapsed osteosarcoma.
• Long-term remission and survival are achievable in osteosarcoma patients with appropriate treatment strategies.