PMC8495066_01
Standing bilateral radiographs of the knee of natural history patient #1 showing results of a unilateral knee arthroplasty used to treat medial compartment osteoarthritis over 5 years following an iatrogenic medial meniscal root tear (left knee).
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F9
The patient's course of treatment was complicated by an initially untreated PMMRT. (See Figure 9).
PMC8495066_02
PMC8495066_03
Coronal MRI of the knee of natural history patient #3 showing progression of osteoarthritis over 5 months following neglected medial meniscal root tear (right knee).
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F10
Returning at 2 years after injury, new MRIs were obtained (See Figure 10) which demonstrated meniscal extrusion, abundant subchondral edema, loss of cartilage surface on the MFC and MTP weight-bearing areas and decreased medial joint space on standing Rosenberg radiographs.
PMC8495066_04
Coronal (A) and sagittal (B) MR images of the knee of natural history patient #4 showing progression of osteoarthritis over 5 months following neglected medial meniscal root tear (left knee).
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F11
Diffuse full-thickness chondral fissuring and signs of OA were noted on the weight-bearing surfaces of both the MTP and lateral femoral condyle (LFC). (See Figure 11).
PMC8495066_05
Coronal (A) and sagittal (B) MR images of the knee of natural history patient #5 showing progression of osteoarthritis over 5 months following neglected medial meniscal root tear (right knee).
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F12
Clinical evaluation revealed no other probable cause for this rapid progression to OA. (See Figure 12).