A complete tear of the quadriceps tendon is a disabling injury. It usually requires surgery to regain full knee function. Most people with complete tears will require urgent surgery to repair the torn tendon. Surgery is also an option for people with partial tears who also have tendon weakness and degeneration. Surgical repair reattaches the torn tendon to the top of the kneecap. People who require surgery do better if the repair is performed early after the injury. Early repair may prevent the tendon from scarring and tightening in a shortened position.
Symptoms:
An indentation at the top of your kneecap where the tendon tore
Bruising
Tenderness
Cramping
Your kneecap may sag or droop because the tendon is torn
You are unable to straighten your knee
Difficulty walking due to the knee buckling or giving way
Causes:
Heavy load on the leg with the foot planted and the knee partially bent
