Mesenchymal chondrosarcoma and simulating lesions of the orbit

Although an extremely rare neoplasm, orbital mesenchymal chondrosarcoma has a characteristic radiologic appearance. Suspicion of this lesion preoperat ively can be of great value to the ophthalmologist because it tends to prod uce profuse bleeding at biopsy. This article reviews the clinical presentat ion, pathologic features, and radiologic findings of patients with orbital mesenchymal chondrosarcoma.