Mesenchymal Chondrosarcoma at the Falx Cerebri

Intracranial mesenchymal chondrosarcoma is one of the rare tumors of the central nervous system, which often presents as an aggressive-appearing extra-axial hypervascular tumor at the falx cerebri. The tumor presents mostly in young adults, while meningioma or metastatic intracranial tumor most commonly in aged people. However, its imaging findings are non-specific. In this article, we present a 13-year-old girl with this primary intracranial tumor and its pellucid magnetic resonance imaging findings. We also review the other subtypes of chondrosarcoma and discuss the differential diagnosis of an aggressive-appearing extra-axial hypervascular tumor at the falx cerebri.