Chondroblastic Osteosarcoma, also known as chondrosarcomatous osteogenic sarcoma, is related to mesenchymal cell neoplasm and extraosseous osteosarcoma, and has symptoms including pain An important gene associated with Chondroblastic Osteosarcoma is BGLAP (Bone Gamma-Carboxyglutamate Protein). Affiliated tissues include bone and bone marrow, and related phenotype is immune system.