The patient went on to have a resection.

HIstology:

The resected tumor shows variable cellularity and mild nuclear pleomorphism. Some of the fragments contain bone and there is a strong suggestion of permeative growth in these fragments. There are multiple foci of chondrocyte necrosis present. The appearance is that of a low-grade chondroid neoplasm, consistent with low-grade chondrosarcoma.

FINAL DIAGNOSIS: low-grade chondroid neoplasm, consistent with chondrosarcoma grade 1.