RECONSTRUCTION OF CHRONIC QUADRICEPS TENDON RUPTURE USING AUTOLOGOUS SEMITENDINOSUS GRAFT: A CASE REPORTINTRODUCTION :Chronic quadriceps tendon rupture is a relatively rare injury that can be challenging to treat. While autologous tendon grafting is a widely accepted method, it is acknowledged that the process of harvesting tendons results in extended rehabilitation and heightened surgical complications, especially in older patients or those with pre-existing co-morbidities. The reconstruction of chronic quadriceps tendon injuries presents significant challenges and yields unsatisfactory results.1 In this case report, we reported a 17-year-old male with chronic quadriceps tendon rupture treated using ipsilateral Manuscript without author details Click here to view linked References semitendinosus graft and suture anchor to propose an option of surgical technique for quadriceps tendon reconstructionCASE HISTORY :A 17-year-old male came to our institution with left knee pain since 8 months ago after he fell into a ditch. After the incident, the patient complained of left knee pain, especially when he tried to straighten his knee. Physical examination demonstrated palpable gap on suprapatellar region.