Parosteal Osteosarcoma, also known as juxtacortical osteosarcoma, is related to periosteal osteogenic sarcoma and osteogenic sarcoma. An important gene associated with Parosteal Osteosarcoma is MDM2 (MDM2 Proto-Oncogene), and among its related pathways/superpathways are DNA damage_ATM/ATR regulation of G1/S checkpoint and Bladder cancer. Affiliated tissues include bone and lung, and related phenotypes are neoplasm and limbs/digits/tail