What are the signs of a torn quadriceps tendon?

What people usually notice

The quadriceps tendon joins the big thigh muscle to the top of the kneecap. When it tears, patients typically describe:

• A sharp pain or pop just above the kneecap, often while stumbling or landing
• The knee giving way, sometimes with a fall
• Swelling and later bruising above and around the kneecap
• Being unable to lift the leg straight off the bed, or the knee sagging as they try
• Walking stiff-legged, swinging the leg rather than bending it
• Difficulty getting up from a chair or going up even one step

Partial or complete?

In a complete tear, the link between muscle and kneecap is broken. The leg cannot be held straight against gravity and a gap can often be felt above the kneecap, although swelling may hide it.

In a partial tear, some fibres are intact. The leg can usually be lifted, but it is painful and weak. Partial tears are sometimes treated in a brace, so the distinction matters, and examination by itself can be misleading in a very swollen knee.

Why it is sometimes missed

Many people can still stand and even walk short distances with the knee locked straight, so they assume it is a sprain. Swelling fills the gap, and an X-ray may look normal apart from the kneecap sitting a little low. Delays of several weeks are not unusual, and they can make repair more difficult.

How it is confirmed

At Aman Hospital in Doha, Dr. Gelber examines the knee, checks your ability to straighten it against gravity and feels along the tendon. An X-ray looks at the height of the kneecap and excludes a fracture. Ultrasound or MRI confirms whether the tear is partial or complete and how far the tendon has retracted, which helps plan treatment.