A 12-year-old Girl With an Extraosseous Chondrosarcoma

Abstract

Intracranial extraosseous chondrosarcomas are a rare entity and comprise less than 0.15% of all intracranial neoplasms.A report of a pediatric extraosseous chondrosarcoma with clinical, pathologic and radiographic findings.A twelve year old girl with a left parietal heterogeneously enhancing mass, confirmed by pathology to be an extraosseous chondrosarcoma. The imaging in this case revealed no restricted diffusion on diffusion-weighted imaging (DWI) but rather showed hyperintensity on apparent diffusion coefficient (ADC) mapping. The high diffusivity (dark signal on DWI, hyperintensity on ADC map) demonstrated in our case has not been reported previously with extraosseous chondrosarcomas, and is important to note in order to distinguish them from other neoplasms such as a meningiomas.