Extended Medial Coronal Plane Plica Formed by a Rare Fusion of Medial Patellar and Biblike Plicae in the Knee: A Case Report.

The traditional plicae of the knee have been updated recently with reports of new variants in the coronal plane. We report another variant, an extended medial coronal plane plica (EMCPP), previously unreported, in a 70-year-old lady with osteoarthritis of the knee and a loose body. The preoperative symptoms after the excision of the plica and loose body were temporarily relieved for 11 months before she underwent total knee arthroplasty (TKA) for associated osteoarthritis. Excision of the EMCPP could resolve symptoms, but resultant internal scarring or the plica itself could cause difficulty in exposure during TKA.

"Flipped Lid" Fracture of the Lateral Tibial Plateau with Dislocated Lateral Meniscus: A Case Report.

CASE: We present a rare "flipped lid" type of fracture of the lateral tibial plateau with dislocation of the lateral meniscus into the notch with intact roots. This was fixed using headless screws through arthrotomy and peripheral suturing of the meniscus. At the 1-year follow-up, although there was terminal restriction of 10° flexion with redislocation of the lateral meniscus, the patient was able to perform all daily activities and declined further surgery. CONCLUSION: Flipped lid-type fracture is rare and results in good outcome when fixed early. Meniscal dislocation repair requires close monitoring to detect failure.

Management of Anterior Cruciate Ligament Aplasia for the Arthroscopy Surgeons: A Systematic Review.

Background: Anterior Cruciate Ligament Aplasia (ACLA) is a rare condition which can sometimes remain asymptomatic into adult life. Although the quoted incidence is 1.7 per 100,000 live births, it is higher due to these silent cases and can be encountered by the arthroscopy surgeon doing reconstructive procedure for the ACL. The aim of this study is to get information on clinical presentation, imaging, arthroscopy findings and management of the knee in patients with ACL aplasia through a systematic review relevant to the arthroscopy surgeon in making a decision when they encounter such a case. Methods: We performed a systematic review of the literature to get information on this condition that may be relevant to the arthroscopy surgeon from PubMed, Ovid full text, Embase and Ovid Medline databases. After exclusions and inclusions, we found 31 articles relevant to the search which included 101 knees. Results: Most of the publications were case reports due to the rarity of this condition. ACLA is commonly associated with Fibular Hemimelia, Congenital Dislocation of the Knee and Proximal Focal Femoral Deficiency (PFFD). Clinical findings, imaging appearances, other associated findings with ACLA have been listed and management options listed and discussed. Conclusions: Patients with ACLA are often asymptomatic and arthroscopic reconstruction of the ACL appears to be a viable option in selected symptomatic cases only. The arthroscopic surgeon should be aware of the clinical picture and intraarticular findings of ACLA to recognize the condition and make a decision on the optimal management. Further studies are required to report on long-term outcomes of the condition in terms of secondary osteoarthritis development as well as the procedures performed. We recommend forming a global registry to study and further understand the aspects of this condition. Level of Evidence: 4. Supplementary Information: The online version contains supplementary material available at 10.1007/s43465-022-00651-2.

Infrapatellar Coronal Plane Plica in a 60-Year-Old: A Case Report.

CASE: We report a rare case of coronal plane infrapatellar plica, also called "Bib-like plica," in a 60-year-old patient. The start-up pain she experienced before arthroscopic excision completely resolved after the procedure. As far as we know, this is the first case of this plica in the literature in a 60-year-old patient who had associated articular cartilage loss over the medial femoral condyle adjacent to the plica, with positive magnetic resonance imaging findings outlining the structure, possibly impinging the infrapatellar fat pad. CONCLUSION: Excision of a symptomatic plica by arthroscopy resulted in complete relief of pain in this patient.