Chondrosarcoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant cartilaginous matrix-producing mesenchymal neoplasm arising from the bone and soft tissue. It usually affects middle-aged to elderly adults. The pelvic bones, ribs, shoulder girdle, and long bones are the most common sites of involvement. Most chondrosarcomas arise de novo, but some may develop in a preexisting benign cartilaginous lesion.

**Synonyms:** - CHONDROSARCOMA, MALIGNANT - Chondrosarcoma, NOS - chondrosarcoma