PCL Tear: Symptoms and Treatment in Doha

What is the PCL?

The posterior cruciate ligament (PCL) sits in the centre of the knee, just behind the ACL. It connects the thigh bone (femur) to the back of the shin bone (tibia) and is the main restraint against the tibia sliding backwards. It is thicker and stronger than the ACL, so it tears less often and usually needs more force.

PCL injuries are graded by how far the tibia sags backwards on examination. Grade I and II injuries are partial or stretched ligaments. A grade III injury is a complete tear, and it often comes with damage to other structures, especially the posterolateral corner on the outside of the knee.

Unlike the ACL, the PCL has a better blood supply and a sleeve of tissue around it, so partial tears in particular can heal with the right protection.

Symptoms: what patients notice

Isolated PCL tears are often less dramatic than ACL tears, which is why they are sometimes missed. Patients typically describe:

• Pain at the back of the knee or deep inside the joint
• Mild to moderate swelling over the first day
• "It feels wobbly when I go down the stairs or walk downhill"
• Discomfort when kneeling or squatting
• Aching at the front of the knee after weeks or months, as the kneecap takes more load

A knee that feels very unstable, is badly swollen, or has numbness in the foot suggests more than one ligament is injured and needs urgent assessment.

Causes and who gets it

The classic mechanism is a direct blow to the front of the shin with the knee bent. In a car accident, the knee strikes the dashboard and the tibia is pushed backwards. In sport, it happens when a player falls onto a bent knee with the foot pointed, for example a goalkeeper diving in football, a tackle on an artificial pitch, or a fall in basketball.

In Qatar, road traffic accidents and motorbike or quad bike falls in the desert are common causes of more severe PCL injuries. Footballers, padel players who land on a bent knee, and workers who fall from height on industrial sites are also seen.

Diagnosis

Diagnosis starts with examination. The posterior drawer test and the sag sign, where the shin visibly drops back when the knee is bent, are key. Dr. Gelber also checks the outside of the knee carefully, because a missed posterolateral corner injury is a common reason for poor results.

An MRI scan confirms the tear and shows associated damage to the meniscus, cartilage and other ligaments. Stress X-rays, which measure how far the tibia moves backwards under a standard load, help grade the injury and guide the choice between bracing and surgery.

Non-surgical treatment

Most isolated grade I and II PCL tears, and many isolated grade III tears, are treated without surgery. Treatment usually includes:

• A dynamic PCL brace that supports the back of the tibia, often worn for several months
• Early quadriceps strengthening, which helps hold the tibia forwards
• Limiting hamstring-heavy exercises in the early phase, as they pull the tibia backwards
• A gradual return to running and sport once strength and control are restored

The aim is to let the ligament heal in a good position rather than stretched. Follow-up examinations check that the sag is not getting worse.

When surgery is considered

PCL reconstruction is usually considered when the PCL is torn together with other ligaments, when there is a bony avulsion that can be fixed, or when an isolated tear leaves the knee unstable and painful despite good rehabilitation.

Reconstruction replaces the torn ligament with a tendon graft, placed arthroscopically. When other ligaments are also torn, they are usually reconstructed at the same time so the knee is balanced.

Recovery and when to see a specialist in Doha

With non-surgical treatment, many patients return to light sport at around three to four months, depending on the grade. After reconstruction, return to pivoting sport usually takes nine to twelve months.

See a knee specialist if you hit your knee on a bent position and it still aches at the back after a week, if the knee feels loose going downstairs, or if you were in a road accident and your knee was injured. Dr. Gelber assesses PCL injuries at Aman Hospital in Doha and agrees a plan based on the grade and any associated injuries.