chondral lesions

Magnetic

resonance arthrography of the hip: technique and spectrum of findings in younger patients. Sagittal fat-saturated T1-weighted arthro-MR image shows a complete thinning of femoral and acetabular cartilage at the superior aspect of the joint associated with subchondral high-signal consistent with subchondral oedema

Subchondral

insufficiency fractures, subchondral insufficiency fractures with osteonecrosis, and other apparently spontaneous subchondral bone lesions of the knee—pathogenesis and diagnosis at imaging. Bone marrow edema (BME)-like signal associated with focal chondral lesion. a, b T1-weighted (a) and fat-suppressed T2-weighted MR images (b) show BME-like signal intensities similar to those of subchondral insufficiency fractures (SIFs) (asterisks). Here, the BME-like signal intensity is related to a deep focal cartilage defect (arrow in b), evident in the present case