Quadriceps tendon tear: What to do

Causes of Quadriceps Tendon Tear

A combination of acute trauma or degenerative changes in the tendon can cause a ruptured quadriceps tendon. Trauma can be due to: 

• Sudden forceful movements—such as jumping, stumbling, or landing awkwardly—can overload the tendon and cause it to rupture.

• Direct trauma to the front of the knee, such as a fall or a sports collision, may also result in a tear.

In many cases, the tendon has undergone degenerative changes before rupture. These changes, often related to ageing or chronic overuse, weaken the tendon and make it more susceptible to tearing. Risk factors include systemic conditions such as diabetes, chronic kidney disease, rheumatoid arthritis, and the use of corticosteroids or fluoroquinolone antibiotics, which can impair tendon health. In athletes or active individuals, repetitive strain from jumping, squatting, or heavy weight training can lead to chronic tendinopathy, which may eventually progress to a ruptured quadriceps tendon tear.

Diagnosis of Quadriceps Tendon Tear

Diagnosis starts with a careful clinical assessment:

• Patients often report a sudden onset of pain at the front of the knee, sometimes with a popping or tearing sensation.

• There may be swelling, bruising, and tenderness just above the patella.

• In a complete tear, patients are typically unable to straighten the knee or perform a straight-leg raise actively.

• A palpable gap may be felt just above the kneecap where the tendon has ruptured.

Partial tears may present with less dramatic symptoms but can still significantly affect knee strength and function.

Imaging is essential to confirm the diagnosis and assess the extent of the injury:

• Ultrasound is an excellent first-line tool. It can quickly identify full or partial tendon tears, as well as swelling. It is often used in real-time during physical examination.

• MRI remains the gold standard for imaging. It provides a detailed view of the quadriceps tendon, confirming whether the tear is partial or complete and evaluating associated injuries such as joint effusion or damage.

• X-rays may show a low-lying patella in cases of complete tear due to loss of tension in the quadriceps mechanism.

Treatment Options for Quadriceps Tendon Tear

Trepatient’spends on the severity of the tear, the patient’s activity level, and overall health status:

Non-surgical treatment is reserved for partial tears or patients who are less active or not suitable for surgery. Treatment involves immobilisation of the knee in extension using a brace for several weeks, followed by a structured physiotherapy program. Rehabilitation focuses on gradually restoring range of motion, strength, and function. Sometimes, PRP injections are used to complement rehabilitation in partial tears. Generally, we use a high concentration PRP system such as the Athrex ACP Max for tendon injections. 

Surgical Repair is recommended for complete tears or high-grade partial tears, especially in active individuals.

• The torn tendon is reattached to the patella using strong sutures or anchors.

• Postoperative mindividual’spically includes:

  • Knee immobilisation in extension for 4–6 weeks.

  • Progressive physiotherapy to restore movement and strength.

  • Return to sport is a gradual process and typically occurs after 4–6 months, depending on the individual’s recovery.

Final word from Sportdoctorlondon regarding Quadriceps tendon tear 

Quadriceps tendon tears are serious injuries that can significantly impair mobility if left untreated. Early diagnosis, appropriate imaging, and timely intervention—whether surgical or conservative—are essential for optimal recovery. For active individuals and athletes, a personalised rehabilitation plan is key to returning to pre-injury levels of performance and avoiding reinjury.