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Insights into Imaging
Fig. 31 | Insights into Imaging

Fig. 31

From: Subchondral insufficiency fractures, subchondral insufficiency fractures with osteonecrosis, and other apparently spontaneous subchondral bone lesions of the knee—pathogenesis and diagnosis at imaging

Fig. 31

Radiographic of osteonecrosis of systemic origin. a Radiograph shows areas of heterogeneous bone sclerosis, in this case particularly prominent in the condyles. b CT arthrography shows areas of irregular bone densification corresponding to osteonecrotic lesions (asterisks) surrounded by sclerotic rims. Note collapsed segments in the weight-bearing areas of inferior condylar poles (arrows) associated with fractures within necrotic areas (arrowheads)

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