  Search Rare Diseases    Mesenchymal Chondrosarcoma  NORD is
very grateful to Robert G. Maki, MD, PhD, Departments of
Medicine, Pediatrics, and Orthopaedics, Mount Sinai School of
Medicine, New York, NY, for assistance in the preparation of
this report.  Synonyms of Mesenchymal Chondrosarcoma    • No
synonyms found.  Disorder Subdivisions    • Extraskeletal
Mesenchymal Chondrosarcoma  General Discussion    The symptoms
of mesenchymal chondrosarcoma may vary depending upon the exact
location and progression of the tumor. Most mesenchymal
chondrosarcomas arise in the bones of the jaw, spine or the
ribs. However, the tumor can arise almost anywhere within the
body. The arms and legs are also frequent sites of tumor
development, especially the main bone of the thigh (femur).
Approximately one-third of cases occur outside of bone,
appearing as soft tissue masses. Cases that occur outside of
bone may be referred to as extraskeletal mesenchymal
chondrosarcoma and often affect the central nervous system or
muscle. T