[Evanescent exostosis. A report on one case (author's transl)]

Area of Science:

• Orthopedic Surgery
• Pediatric Oncology
• Radiology

Background:

• Exostoses are benign bone tumors, often occurring in children and adolescents.
• The lower femur is a common site for exostosis development.
• Large exostoses can pose risks for growth disturbance and malignant transformation.

Observation:

• A 6-year-old boy presented with an isolated, large exostosis at the distal femur.
• The lesion was monitored over a seven-year period.
• Clinical and radiological assessments were performed throughout the follow-up.

Findings:

• The exostosis demonstrated a significant, almost complete recovery over the seven-year observation period.
• The bone lesion showed signs of regression and remodeling.
• No evidence of malignant transformation or significant growth disturbance was noted.

Implications:

• This case suggests favorable long-term outcomes for isolated large femur exostoses in children.
• It underscores the importance of long-term monitoring for pediatric bone tumors.
• The findings may inform management strategies and prognostication for similar cases.