Primary Central Atypical Cartilaginous Tumor/Chondrosarcoma, Grade 1

**Semantic type:** Neoplastic Process

**Definition:** Central atypical cartilaginous tumor/chondrosarcoma, grade 1 arising in the medulla of bone without a benign precursor.

**Synonyms:** - Primary Conventional Central Atypical Cartilaginous Tumor/Chondrosarcoma, Grade 1