Cleavage plane sign is seen in?: (A) Parosteal osteosarcoma, (B) Ewing's sarcoma, (C) Chondrosarcoma, (D) Metastasis
Answer is A. Ans AParaosteal sarcoma arises exophytically from long bones and thus there is a small plane of cleavage between it and the main shaft of bone - the Cleavage plane sign.