Radiology Quiz Case 1: Diagnosis

Benign osteoblastoma, a rare benign tumor of the bone, was first described by Virchow¹ in 1863. Osteoblastomas account for fewer than 1% of all bone tumors and 3% of all benign bone tumors.² They usually occur in the vertebrae and in long tubular bones.³ The skull is involved in fewer than 15% of cases.⁴ The male-female ratio is 2:1, and most cases occur in the second decade of life.⁵