Q1 · Osteosarcoma
NEET PGHardA 'sunburst' periosteal reaction and Codman's triangle around the knee in an adolescent suggest?
Explanation
A 'sunburst' or 'sunray' periosteal reaction with Codman's triangle, the elevated periosteum, are classic radiographic features of osteosarcoma, most commonly around the knee in adolescents. Ewing sarcoma instead shows a lamellated 'onion-skin' reaction.