A Rare Extraskeletal Osteosarcoma Appearing After 55 Years on a Large Stage 3 Burn Scar

Area of Science:

• Oncology
• Dermatology
• Pathology

Background:

• Chronic burn wounds are recognized as potential precursors to various malignant skin tumors.
• Deep stage 3 burns may increase the risk of deeper carcinogenesis.
• Altered local immune defense in burn scars can influence tumor development.

Observation:

• This report details a patient with severe stage 3 burn sequelae on the leg.
• Fifty-five years post-injury, the patient developed a significant extraosseous osteosarcoma within the scar tissue.

Findings:

• While squamous cell carcinoma is the most common malignancy post-burn, other types like basal cell carcinoma and melanoma are less frequent.
• Malignant transformation of cutaneous soft tissue and tumors of histiocytic origin in burn areas are rare.
• Osteosarcoma arising in burn scars is exceptionally rare, with only two prior case reports.

Implications:

• This case highlights the potential for rare and aggressive malignancies, such as osteosarcoma, to arise decades after severe burn injuries.
• Understanding the long-term oncogenic potential of burn scars is crucial for patient monitoring and management.
• Further research into the mechanisms of burn-induced carcinogenesis may reveal novel therapeutic targets.