Abstract
BACKGROUND: Although chronic quadriceps tendon rupture and defect are rare, they pose significant challenges in surgical treatment. In these cases, quadriceps tendon reconstruction is necessary. Either autologous or allogeneic tendons have been used for this reconstruction. But a choice with the ligament augmentation and reconstruction system (LARS), can potentially minimize various complications associated with autologous or allogenic tendon. CASE PRESENTATION: A 35-year-old man complained of knee pain due to recurrent fibroma of tendon sheath (FTS) in the quadriceps tendon, which had undergone arthroscopic resection 12 months ago. In this case, LARS artificial ligament was implemented to fill the space and restore knee extension function after resecting the tumor of quadriceps tendon. The patellar side of the artificial ligament was fixed by double-beam tunnel compression, and the soft tissue side was fixed by suture. During follow-up, the pain disappeared and the knee joint function also returned to normal. CONCLUSIONS: Quadriceps tendon reconstruction with LARS ligament could achieve good clinical results and should be a good choice for defect of quadriceps tendon.