PMC8603924_01
Case 1. Posterior drawer sign with more 10 mm on stress radiographs of the right knee. No bony avulsion was noticed.
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F1
Figure 1).
Case 1. MRI aspect after second assessment reveals cartilaginous nodule in the intercondylar notch with femoral oedema in coronal plane (left) and abnormal thickening of the proximal part of the PCL (right).
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F2
Figure 2).
Arthroscopic view of the PCL's cartilaginous femoral defect after debridement. MFC = Medial Femoral Condyle.
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F3
Despite specific rehabilitation protocol, the evolution was limited by a major knee mobility restriction (range of mobility: 0-20-70), and an arthroscopic arthrolysis was performed six months after the reinsertion surgery Figure 3.
PMC8603924_02
Case 2. AP and oblique views with ossification in the intercondylar notch area, one year following the initial trauma.
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F4
Figures 4 and 5).
Case 2. Lateral view and sagittal sequences of second MRI showing ossification of the cartilaginous PCL avulsion on the femur.
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F5
Figures 4 and 5).
Case 2. First MRI with DP FS and sagittal sequences. Thickening of the proximal part of PCL (white arrows) with decreased PCL angle (right) and intact ACL (left).
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F6
Fat Suppressed (DP FS) sequence with sagittal images reveals abnormal thickening of the proximal part of the ligament that appear as a continuous structure without redundant or retracted aspect (cf. Figure 6). Figure 6).
Case 2. First MRI with DP FS and coronal sequences. Cartilaginous nodule and "nail-biting" aspect in the medial part of the intercondylar notch (white arrows) was misdiagnosed.
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F7
Figure 7).