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Insights into Imaging
Fig. 17 | Insights into Imaging

Fig. 17

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. 17

Negative prognostic value of low signal bone marrow on T2-weighted MR image. a The subchondral bone of the two medial femorotibial joint surfaces shows marked low signal intensity on a T1-weighted MR image. b, c Coronal and sagittal fat-suppressed T2-weighted MR images (b, c) show relatively wide and thick subchondral areas adjoining the articular surface, with low signal intensity (arrows), suggestive of SIF-ON. d–f Three months later, a significant bone marrow low signal intensity persists on T1-weighted image (d) and coronal and sagittal fat-suppressed T2-weighted images show pejorative evolution with a collapse of the tibial plateau and a wide subchondral bone dissection and chondral fracture in the lower pole of the condyle (e, f)

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