 Although osteoblastoma demonstrates increased radiotracer accumulation, its appearance is nonspecific, and differentiating these lesions from those due to other causes involving increased radiotracer accumulation in the bone is difficult.Therefore, bone scans are useful only in conjunction with other radiologic studies and are not best used alone.In the US, osteoblastomas account for only 0.5-2% of all primary bone tumors and only 14% of benign bone tumors making it a relatively rare form of bone tumor.