GAMUT D-81-S3
TYPES OF CHONDROSARCOMA


PRIMARY
1. Classical or central (medullary)
2. Clear cell 
3. Dedifferentiated
4. Juxtacortical or periosteal  
5. Mesenchymal; soft tissue
6. Myxoid; soft tissue


SECONDARY, ARISING IN
1. Bone following radiation therapy
2. Enchondroma (incl. Ollier disease; Maffucci S.)
3. Osteochondroma (incl. hereditary multiple exostoses  {multiple cartilaginous exostoses; osteochondromatosis})
4. Other preexisting benign cartilaginous lesion (eg, chondroblastoma (Codman tumor); chondromyxoid fibroma)
5. Paget's disease