<prompt> In myositis ossificans mature bone is seen:At peripheryIn centerWhole muscle massIn the joint capsule  <response>: In myositis ossificans, there is peripheral ossification and central lucency of the mass Osteosarcoma- growth in to out Myositis ossificans- growth out to in I.O.C is CT SCAN The mass is usually separated from underlying bone by at least a thin line 