Anterior cruciate ligament injuries are one of the most frequent knee joint injuries, leading to instability which limits return to sport activity, and is one of osteoarthritis risk factors. Treatment issues are present since 1895, when Mayo Robertson performed first documented open ACL repair. Positive short-term results of open suturing led to rising popularity of this method, which in 70’s and 80’s became golden standard of ACL injury treatment. Feagin in his longterm observations noticed that nearly half of patients after open ACL repair, during first 5 years suffered from reappearing ACL tear. Since then, for many years reconstruction techniques with graft use became most popular technique. Increasing knowledge of ligament healing biology, creation of Sherman’s ACL injury location classification, development of arthroscopic techniques, connected with growing tendency for biological treatment caused increase in repair techniques interest. Most important potential benefits of this techniques are: limitation of perioperative trauma – no need to harvest graft, drill large tunnels, possible retention of additional ACL proprioceptive feeling, easier eventual reoperation. Effort to save patient’s ACL is especially indicated in case of acute trauma (depending on source up to 3-14 weeks from injury), with proximal tear (type I in Sherman classification) with good remnant quality. Most popular techniques of ACL repair are: proximal ACL attachment reinsertion, IBLA – Internal Bracing Ligament Augmentation and DIS – Dynamic Intraligamentary Stabilization. The aim of this study was to present actual state of knowledge concerning options of primary ACL repair, it’s results, indications, and sharing authors own experiences in this treatment methods. Preliminary, available in literature, results of studies concerning methods mentioned above are good and very good, comparable, and sometimes even superior to results of classical ACL reconstruction. However, there is lack of long-term studies, that might confirm increase in survivorship rate of repaired ACLs comparing to previous open suturing technique.

Introduction: Cancer of the patella is a rare condition. Giant cell tumor of the patella is an extremely rare and a difficult to solve therapeutic problem. Depending on the degree of bone destruction, it may cause significant knee joint dysfunction. It is assumed that surgery is the treatment of choice. Material/Methods: This study presents an innovative treatment of a giant cell tumor of the patella in a 40-year-old male with significant dysfunction of the knee extensor mechanism. Complex therapy included neoadjuvant treatment using a human monoclonal antibody IgG2 that binds to RANKL (Denosumab) and follow-up allogeneic grafting of knee extension mechanism. Results: Follow-up CTs showed correct positioning and healing of grafted knee extensor mechanism. Early functional outcome was perfect. Seven weeks after the surgery, reduction of pain, improvement of the contour of the joint, full active extension and flexion of 110° were noticed. Fifteen months after the surgery, the patient presented complete active extension and flexion of the knee joint, actively participated in professional life and CT tests did not reveal features of tumor recurrence. Conclusions: Treatment of isolated giant cell tumor of the patella with destruction of patella and joint dysfunction does not have a clear solution in the available literature. Such a condition may also exclude traditional procedures. In such cases, grafting of the whole extensor mechanism appears to be the appropriate treatment.