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Figure 8a. Osteonecrosis of the talus in a 51-year-old woman who had received a short course of prednisone. Axial (a) and coronal (b) CT scans through the right talus show a mixed hypoattenuating-sclerotic pattern along the medial half of the talar dome that is outlined by a serpiginous sclerotic line (arrows). The mixed imaging pattern is consistent with osteonecrosis.
