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Table 1 OO’s typical and atypical imaging findings

From: Osteoid osteoma: the great mimicker

  Typical Atypical
Number Single nidus Multicentric or metachronous
Location within bone Cortical Medullary or subperiosteal
Location along bone Diaphysis Metaphysis or epiphysis (including intra-articular)
Distribution Long bones (especially femur and tibia) Extremities and axial skeleton