Quadriceps tendon rupture is a condition where the quadriceps tendon, which connects the quadriceps muscle to the knee, gets torn or detached. This can result in pain and weakness in the affected leg, difficulty walking, and an inability to fully extend the knee. Treatment options for quadriceps tendon ruptures includes surgery to repair the tendon, physical therapy to regain strength and mobility, and the use of assistive devices such as crutches or a knee brace.