PMC6721472_01
(a) Eighteen-month postoperative radiographs of the left knee performed as a screening examination due to pain following minor knee trauma. AP: lateral and notch views demonstrate expected postoperative changes from ACL reconstruction with well-positioned femoral tightrope button. (b) Two-year postoperative radiographs of the left knee performed due to new onset of symptoms in the posterior knee. There is evidence of interval migration of the TightRope button into the posterolateral joint space.
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Physical exam at this time was unremarkable and radiographs (Figure 1(a)) demonstrated no evidence of complication of her reconstruction as compared with other imaging during her postoperative course. Radiographs at this time demonstrated a migrated TightRope button (Figure 1(b)).
(a) Arthroscopic notch view visualized through the anterolateral portal demonstrating a well-vascularized ACL graft. (b) Arthroscopic view of the lateral compartment visualized through the anteromedial portal demonstrating the migrated TightRope button under the posterior horn of lateral meniscus.
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Diagnostic arthroscopy revealed a stable-appearing ACL graft with probing that appeared well vascularized (Figure 2(a)). TightRope button was located in the posterolateral knee, under the posterior horn of the lateral meniscus (Figure 2(b)).