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Anterior ankle impingement is a frequent cause of chronic ankle pain and swelling. A pathological examination has been reclassified as “anterior ankle impingement syndrome.” Soft tissue impingement is prevalent in the anterolateral compartment of the ankle, while a bony spur often causes impingement in the anteromedial compartment. Although open surgery has yielded good outcomes historically, it is associated with several complications. On the other hand, the development of ankle arthroscopy has reduced these risks significantly and has been used effectively in numerous studies to treat impingements caused by anterior bony spurs or soft tissue. An accurate preoperative clinical diagnosis and diagnostic imaging are critical for surgical planning, particularly for identifying bony spurs in front of the ankle. Narrowing joint space, large bone fragments, and other factors can influence the surgical outcomes. Computed tomography scans precisely evaluate the bony spur size, while magnetic resonance imaging scans help assess soft tissue lesions. Therefore, understanding diagnosis and treatment is important, and an accurate understanding of patient prognostic factors, such as osteoarthritis and degenerative osteoarthritis, eventually affects patient outcomes. This paper discusses the clinical symptoms, causes, diagnosis, surgical method, and postoperative rehabilitation of anteromedial and anterolateral ankle impingement syndrome and reports the results of arthroscopic surgery. [ABSTRACT FROM AUTHOR]

Dislocations of the acromioclavicular joint can occur in contact sports or injuries from falling. Surgical treatment is required when the dislocation is severe in a young and active patient, but there is no accumulated surgical method yet. Recently, many surgical techniques using arthroscopy have been introduced due to the development of arthroscopic technology. Therefore, this paper examined the methods, results, and complications for the arthroscopic treatment of acromioclavicular joint dislocations. [ABSTRACT FROM AUTHOR]

Bilateral asymmetric fracture dislocation of a shoulder joint is a rare subtype of shoulder dislocation and refers to the simultaneous fracture-dislocations of the glenohumeral joints in opposite directions. This paper reports a case of a 43-year-old male patient with a bilateral asymmetric fracture dislocation of the shoulder joints following a hypoglycemic shock who was treated with arthroscopic Bankart repair and the arthroscopic modified McLaughlin procedure. To our knowledge, this case is the first in domestic literature, and therefore the authors report this case with the treatment outcome and a literature review. [ABSTRACT FROM AUTHOR]

Osteochondritis dissecans (OCD) is a pathologic condition of the subchondral bone which involves the articular cartilage. Unstable OCD can be fixed with various implants, including bioabsorbable materials. Bioabsorbable materials have several advantages. Removal of the implant is not required, and they have low interference on imaging studies, such as magnetic resonance imaging (MRI). This paper reports a case of surgical treatment using bioabsorbable pins for OCD lesion. MRI showed a displaced osteochondral lesion at medial femoral condyle. Arthroscopic reduction and fixation were attempted initially, but additional mini-open incision was needed to reduce the fibrotic fragment. The fragment was trimmed and fixed with two bioabsorbable pins. Union was achieved at the follow-up without complications. The use of bioabsorbable pins for OCD treatment may be one of successful treatment method. [ABSTRACT FROM AUTHOR]

In advanced gout, monosodium urate crystals are deposited in the joints and surrounding tissues, resulting in gouty tophi. A 45-year-old man was admitted to hospital due to pain and a limited range of motion in his right knee. Magnetic resonance imaging revealed a mass, and arthroscopic surgery and biopsy were then performed. Gouty tophi invading the anterior horns of the medial and lateral menisci were identified and surgically removed. To the best of the author's knowledge, there is no case report of intrameniscal gouty tophi invading both the medial and lateral menisci. This paper presents this case along with a review of the relevant literature. [ABSTRACT FROM AUTHOR]

An anterior cruciate ligament (ACL) avulsion fracture is an uncommon injury that occurs predominantly in the pediatric and adolescent population. Accurate reduction and fixation of an avulsed fragment are necessary to restore and maintain the length of the ACL and normal knee biomechanics. Several techniques are available to repair an ACL avulsion fracture. On the other hand, treatment is controversial in skeletally immature patients due to risk of physeal injury. This paper reports a case of an ACL avulsed fracture in a skeletally immature patient treated with arthroscopic all-inside suture bridge repair, in which an excellent result and firm stability were obtained without physeal injury. [ABSTRACT FROM AUTHOR]

Lipoma arborescens (LA) is a rare lesion that causes joint effusion and pain. LA usually presents as a unilateral knee lesion, and bilateral lesions are extremely rare. LA among adolescent patients is also extremely rare with the disorder having a much higher incidence among adults. This paper reports a 14-year-old boy who was treated for bilateral knee LA. X-rays revealed the characteristic features of LA in both knees, and arthroscopic synovectomy was performed to resect the lesions. Postoperative recovery progressed smoothly, and the patient was eventually relieved of pain and swelling. LA should be considered when adolescent patients present with bilateral pain and swelling, even though this condition is rare in this age group. Furthermore, surgical synovectomy for a complete resection is an appropriate treatment option. [ABSTRACT FROM AUTHOR]