Kikuchi K, Hiranaka T, Kamenaga T, et al. - Researchers assumed that anterior cruciate ligament-deficient (ACLD) is not always a contraindication for medial unicompartmental knee arthroplasty (UKA) when preoperative radiographs showed typical anteromedial knee patterns. Researchers retrospectively distinguished 401 Oxford mobile-bearing UKAs in 282 patients from the database between April 2012 and March 2016. They classified patients whose anterior cruciate ligament (ACL) was severely damaged, but preoperative x-rays exhibited typical anteromedial osteoarthritis patterns, into the ACLD group. The postoperative clinical outcome and component survivorship, with an endpoint of component revision, were compared between ACLD groups and ACL functional (ACLF) groups. The data exhibited that in ACLD knees, mid-term clinical outcomes of Oxford mobile-bearing UKA were similar to those in ACLF knees. In patients with typical anteromedial osteoarthritis radiographs, ACL deficiency is not always a contraindication for medial unicompartmental knee arthroplasty.