31 / 460
P.R.F. Saggin, P. Ferrua, P.G. Ntagiopoulos, D. Dejour
30
acute dislocations recognition and evaluation
of associated lesions. The acute findings include
[25-28] (fig. 6):
- Lateral femoral condyle contusion and⁄or
osteochondral lesion;
- Medial patellar facet contusion and⁄or
osteochondral lesion, sometimes with
osteochondral fragment avulsion;
- Injury of the medial retinaculum at its patellar
attachments or mid-substance; Tearing of the
distal belly of the
vastus medialis obliquus
;
- Injury of the medial patellofemoral ligament
at its femoral origin;
- Patellar tilt and subluxation;
- Joint effusion.
Fig. 6: MRI performed after acute dislocation. The
medial retinaculum is torn and contusions of the
medial patellar facet and lateral condyle are
evident.
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