<prompt> Which of the following is not true in relation to Osteosarcoma?Pagets disease prior irradiation are factorsRb gene mutation is associated with hereditary variantc-myc gene implicated in the genesisCodmans triangle is the characteristic x-ray finding  <response>: c-myc gene implicated in the genesis is wrong. Osteosarcomas occur in all age groups, with a second peak occuring in elderly persons, usually in association with other conditions like pagets disease, etc. A triangular shadow on the x-ray film between coex and raised periosteum codman triangle is charecteristics of osteosarcomas. RB gene mutations account for 60to70 cases of these tumors Robbins basic pathology 9th edition page no 776,777 