Hi OCADers,
Adult patient with mild OA.
Unusual morphology at the osteochondral layer of medial femoral condyle. I have seen this 1-2 before and interpreted as a variant. Does anyone know more about this? How does it develop (growth disturbance?), frequency, any relevance for developing OA etc. Any literature reference would also be appreciated. Thx.
Best,
Björn
Phil just correctly pointed out that the finding is at the lateral femoral condyle, not medial.
Thank you to all who replied:
ocadmsk.com/knee-mri-femoral-cartilage-variant/
Responses were:
3 x chondral pseudo-defect (similar to patella dorsal defect).
1 x similar to lateral femoral notch
1x hereditary variant
1 x analogous to hip (“stellate lesion”)
1 x healed OCL in childhood
Most believe this to be some sort of developmental variant.
It’s not mentioned here or in any other publication I looked at but this is still good resources. Maybe I will name it myself, the ‘Jobke notch’ 😉.
radsource.us/developmental-variants/<na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fradsource.us%2Fdevelopmental-variants%2F&data=04%7C01%7C%7Ce3812640acb04687a38308d8d832b324%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637…>
Björn
Sent: 23 February 2021 11:21
—EXTERNAL EMAIL. Please exercise caution when opening attachments or clicking on links—
Hi OCADers,
Adult patient with mild OA.
Unusual morphology at the osteochondral layer of medial femoral condyle. I have seen this 1-2 before and interpreted as a variant. Does anyone know more about this? How does it develop (growth disturbance?), frequency, any relevance for developing OA etc. Any literature reference would also be appreciated. Thx.
Best,
Björn