Fig. 2From: Primary intraspinal dumbbell-shaped mesenchymal chondrosarcoma with massive calcifications: a case report and review of the literaturePostoperative histopathological findings. The tumor showed primitive round or spindle-shaped undifferentiated cells alternating with zones of well-differentiated cartilage (a HE × 200, b HE × 400). c–f Histopathological examination of the specimen stained positive for S-100, Vimentin, NSE, and CD99, respectivelyBack to article page