From the case:
Chondrosarcoma - grade II (gross pathology)
Download
Info

The image shows a heterogenous intramedullary mass extending through the medial cortex of the distal femur with an associated soft tissue mass. Parts of the lesion are clearly cartilaginous (white and glistening). Scattered regions of whitish-yellow calcification are also present. Features are those of a chondrosarcoma.
Case Discussion
This case was shown to be a grade II chondrosarcoma.
Case reproduced with permission, courtesy of Dr. Katharina Glatz, Basel, Switzerland, Pathorama.ch. All rights reserved; please see original case for copyright information.