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. 2018 Sep 19;9(5):857–882. doi: 10.1007/s13244-018-0643-0

Fig. 17.

Fig. 17

Parosteal osteosarcoma. Axial CT (a, b) images show a lobulated exophytic mass (arrowheads) with central dense ossification in the left temporo-occipital region. Axial T1-weighted (c), axial T2-weighted (d) and axial post-contrast T1-weighted (e) images re-demonstrate a juxta-cortical enhancing lesion abutting the outer table of the left temporo-occipital bones (arrows) with a small component extending into the medullary cavity with associated cortical disruption (dashed arrows)