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Insights into Imaging
Fig. 12 | Insights into Imaging

Fig. 12

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. 12

Visibility of subchondral insufficiency fracture (SIF) in a BME-like area. a–c On T1-weighted MR images (a), the fracture can be masked by the neighboring low signal intensity, while on fat-suppressed T2-weighted (b) or T2-weighted images (c) the fracture is apparent (arrowheads), contrasting with the surrounding high signal. In this case of SIF, BME-like high signal intensity is present on both sides of the fracture, including the area between the latter and the articular surface, corresponding to the area with infiltrated but a not degraded fatty marrow. Note that the fracture line does not completely isolate this subchondral area. The potential for this SIF to heal was confirmed by a follow-up study a few months later showing normalization (d)

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