Figure 2

Hematoxylin and eosin staining of sections from our patient's pelvic tumor mass and skull metastasis. (A) Low-power photomicrograph demonstrating the low-grade chondrosarcoma (black arrows) arising in the stalk of a pre-existing osteochondroma (white arrows). (B) Focally within the stalk of the osteochondroma, the tumor had features of clear cell chondrosarcoma. (C) The skull metastasis consisted entirely of the clear cell chondrosarcoma component.