True statements(s) regarding osteoid osteoma is/are -a) Malignantb) MC bone involvement-tibiac) Local excision or curettage cured) Bone pain relieved by aspirine) X-ray shows : density surrounding radiolucent lesion

Osteoid osteoma is a benign tumor. Most common site involved is diaphysis of Tibia. Pain of osteoid osteoma is relieved by salycylates or other NSAIDs. X-ray shows small radiolucent area (nidus) surrounded by dens sclerosis. The only treatment is wide en block excision along with internal fixation with or without bone grafting.