PMC5039273_01
Radiographs of Case 1. AP view (a) shows grade 3 osteoarthritis according to Kellgren and Lawrence scale and Rosenberg view (b) shows lateral-dominant osteoarthritis.
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Radiographs of his left knee showed lateral-dominant osteoarthritis (Figure 1), and MRI showed that the posterior portion of the lateral meniscus was torn (Figure 2).
MRI of Case 1 (T2 weighted image). The posterior portion of the lateral meniscus is torn.
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Radiographs of his left knee showed lateral-dominant osteoarthritis (Figure 1), and MRI showed that the posterior portion of the lateral meniscus was torn (Figure 2).
Arthroscopic findings of Case 1. The lateral compartment has severe degenerative change and almost no meniscal substance, including the meniscal rim, is observed in the middle and posterior portions of the lateral meniscus. Arrow head indicates the remaining posterior horn of the lateral meniscus (a). On the synovium behind this area, a small projecting tubular soft tissue with pulsation (arrows) is shown (a and b).
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On the exposed synovium behind this area, a 3-4 mm wide projecting tubular soft tissue was identified (Figure 3).
PMC5039273_02
Radiograph of Case 2. AP view shows grade 3 lateral-dominant osteoarthritis according to Kellgren and Lawrence scale.
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Radiographs of her left knee showed lateral-dominant osteoarthritis (Figure 4), and MRI showed that the middle and posterior portions of the lateral meniscus were torn (Figure 5).
MRI of Case 2 (T2 weighted image). The middle and posterior portions of the lateral meniscus are torn.
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Radiographs of her left knee showed lateral-dominant osteoarthritis (Figure 4), and MRI showed that the middle and posterior portions of the lateral meniscus were torn (Figure 5).
Arthroscopic findings of Case 2. Remarkable degenerative change is shown in the lateral compartment. The middle and posterior portions of the lateral meniscus are degeneratively torn (arrow head) and almost no meniscal substance was left in these portions (a). On the exposed synovium behind this area, a small projecting tubular soft tissue with pulsation (arrows) is shown (a and b).
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On the exposed synovium behind this area, a 2-3 mm long projecting tubular soft tissue with a 3-4 mm diameter was identified (Figure 6).