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Insights into Imaging
Fig. 15 | Insights into Imaging

Fig. 15

From: Osteoid osteoma: the great mimicker

Fig. 15

Osteoid osteoma versus chondroblastoma. (a–d) Male, 29 years old, presenting with knee pain for 3 months. MRI sagittal T1 (a), axial and coronal T2 FS (b, c) and CT (d) showed a round and central mineralized nidus (arrows) with reactional bone marrow edema (asterisk) and cortical thickening (dashed arrow in d). (e–h) Male, 24 years old, presenting with ankle pain for 9 months. MRI axial T1 (e), sagittal T2 (f), axial T1 FS GD (g) and CT (h) showed a large and lobulated bone lesion (arrows) with peripheral arciform calcifications (dotted arrows), internal enhancement (c) and reactional bone marrow edema (asterisk)

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