Quadriceps and Patellar Tendon Rupture Treatment in Doha

What is a knee tendon rupture?

The knee is straightened by the quadriceps muscle at the front of the thigh. Its force passes through the quadriceps tendon to the kneecap, and from the kneecap through the patellar tendon to the shin bone. Together these form the extensor mechanism. If either tendon tears completely, that chain is broken and the knee can no longer be actively straightened.

Quadriceps tendon ruptures, above the kneecap, are more common in people over about 40. Patellar tendon ruptures, below the kneecap, are more often seen in younger, active adults. Partial tears also occur and may keep some ability to straighten the knee.

Symptoms

• A sudden pop or tearing sensation, often while landing, stumbling or trying to stop a fall
• Immediate pain and swelling at the front of the knee
• Inability to lift the straight leg off the bed, or the knee buckling when you try to stand
• A dent or gap just above or below the kneecap
• The kneecap sitting higher or lower than on the other side
• Bruising that spreads over the following days

Patients often say "my knee just collapsed" or "I can walk only if I keep the leg stiff".

Causes and who is at risk

These tears happen when the quadriceps contracts strongly while the knee is bending, for example landing from a jump, missing a step or slipping on a wet floor. Healthy tendons are very strong, so a rupture often follows a period of tendon weakness. Risk factors include long-standing patellar tendinopathy, diabetes, kidney disease, gout, rheumatoid arthritis, obesity, steroid injections near the tendon, anabolic steroid use, and some antibiotics of the fluoroquinolone group. In Qatar, we see these injuries in football, basketball and gym training, and in falls at home, at work or on building sites.

Diagnosis

The diagnosis is usually clear on examination: a palpable gap and the inability to perform a straight-leg raise. X-rays show the position of the kneecap and rule out a fracture. An ultrasound or MRI confirms whether the tear is complete or partial and where it is, which helps plan surgery. These injuries are sometimes mistaken for a simple sprain at first, so a swollen knee that cannot be straightened after a fall should be assessed promptly.

Treatment

Partial tears where the patient can still straighten the knee against gravity may be treated without surgery, with the knee held straight in a brace for several weeks followed by gradual bending and strengthening.

Complete ruptures need surgery. The torn tendon is reattached to the kneecap with strong sutures passed through small tunnels in the bone or anchored with suture anchors. Repair is most straightforward when done early, ideally within the first days and generally within two to three weeks, before the tendon retracts and scars. Delayed or neglected ruptures may need reconstruction with a tendon graft, which is a larger operation with a slower recovery.

Recovery

• The knee is protected in a brace, often locked straight for walking at first
• Bending is increased step by step over roughly six weeks, guided by the surgeon
• Crutches are usually needed for the first few weeks
• Strengthening starts once the repair is protected, typically from around six weeks
• Return to desk work is often possible within a few weeks; heavy manual work and sport take longer

Most patients regain the ability to walk normally and climb stairs. Full strength often takes six months or more, and some people notice mild residual weakness or stiffness. Physiotherapy throughout recovery makes a real difference.

When to seek care in Doha

If you felt a pop, cannot straight-leg raise, or see a gap above or below the kneecap, keep the knee straight, avoid walking on it unsupported, and seek urgent assessment. Delay can turn a direct repair into a more complex reconstruction. Dr. Gelber treats extensor mechanism injuries at Aman Hospital in Doha and can arrange imaging and surgery promptly when needed.