Skip to main content
Insights into Imaging
Fig. 10 | Insights into Imaging

Fig. 10

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. 10

Enhancement pattern of a presumed subchondral insufficiency fracture with osteonecrosis. a T1-weighted MR image shows low signal intensity predominating near the condylar surface, extending deep in the epiphysis, and gradually attenuating with blurred outlines (asterisk). b, c On fat-suppressed T2-weighted image (b), this area (asterisk) shows high signal intensity and enhances after intravenous contrast injection (asterisk on post-contrast T1-weighted sequence in c). In this case, the subchondral area immediately adjacent to the bone plate (arrows) shows low signal intensity with fat-suppressed T2-weighting (in b) and no enhancement with post-contrast T1-weighting (in c). This pattern corresponds to an area of degraded subchondral fatty marrow, suggestive of a SIF-ON

Back to article page