Periosteal Chondrosarcoma, also known as juxtacortical chondrosarcoma, is related to chondrosarcoma and chondroma, and has symptoms including pain An important gene associated with Periosteal Chondrosarcoma is IDH1 (Isocitrate Dehydrogenase (NADP(+)) 1), and among its related pathways/superpathways are Metabolism and Defective EXT1 causes exostoses 1, TRPS2 and CHDS. Affiliated tissues include bone, and related phenotypes are Decreased shRNA abundance and Decreased human papilloma virus 16 (HPV16) pseudovirus infection