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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