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📌 Poor Outcome of Osteochondral Autograft Transplantation (OATS)
✅ Signs of Poor Tissue Integration
- Persistent edema-like marrow changes within subchondral bone beyond 18 months
- Subchondral cyst formation
✅ Depression and Proud Grafts
- Depression of the plug less than 1 mm can still result in good clinical outcomes
- Proud grafts can increase contact pressure, leading to degenerative changes
✅ Graft-Host Interface Fissures
- Fissures at the graft-host interface indicate poor outcomes
- Histologically, transplanted mature articular cartilage does not incorporate into adjacent cartilage
✅ Monitoring Subchondral Cysts and Bone Marrow Edema (BME)
- Formation of subchondral cysts
- Fluid-intense rim around the osseous part of the graft
- Persistent subchondral BME or newly developed BME may indicate poor graft incorporation
- Osteonecrosis is a rare complication of OATS
References
- Semin Musculoskelet Radiol 2022;26:216–229
- Clin Imaging. 2019 Nov-Dec;58:129-139
- Semin Musculoskelet Radiol 2018;22:377–385
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
© 2022 MSK MRI Jee Eun Lee All Rights Reserved.
No unauthorized reproduction, redistribution, or use for AI training.
#OATS, #OsteochondralAutograft, #CartilageTransplantation, #SubchondralCysts, #BoneMarrowEdema, #DegenerativeChanges, #Histology, #ClinicalOutcomes, #GraftIntegration, #Osteonecrosis
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