Malignant Extraskeletal Cartilaginous and Osseous Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A malignant mesenchymal neoplasm with cartilaginous or osseous differentiation arising from the soft tissues exclusively. Extraskeletal osteosarcoma is a representative example.

**Synonyms:** - Malignant Extraskeletal Cartilaginous and Osseous Tumor