Figure 1. Photograph of a coronally sectioned gross specimen of a conventional intramedullary chondrosarcoma of the femur demonstrates a multilobulated lesion replacing a long extent of the marrow space (C). Two foci of deep endosteal scalloping (greater than two-thirds of the normal cortical thickness) with expansile remodeling of bone (arrows) are seen. A biopsy site is noted at the superolateral diaphysis (B).