Hereditary exostosis: An unexpected malignant transformation in a pediatric patient.

In this article, we report the case of an 8-year-old child with multiple hereditary exostoses, revealed by the rapid and painful growth of bone deformities in the right leg. After performing a CT scan, multiple exostoses were observed in the pelvic region and both lower limbs. Notably, the exostosis in the right fibula was larger and exhibited a thickened cartilaginous cap. Subsequent MRI confirmed the presence of signs of malignant transformation at this site. Although the literature suggests that malignant transformation is exceptional at this age, ongoing genetic studies may provide insight into the early occurrence of such complications.