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Clinicians Debate Use of Arthroscopy in Patients with Osteoarthritis

NEW YORK—September 11, 2008

In a study published in the New England Journal of Medicine (NEJM) issue of Sept. 11, 2008, investigators concluded that arthroscopic surgery for osteoarthritis of the knee provides no additional benefit to optimized physical and medical therapy. In an accompanying editorial, however, Robert G. Marx, M.D., an associate attending orthopedic surgeon at Hospital for Special Surgery (HSS) in New York, points out that the study has some weaknesses and argues strongly that arthroscopy does have a role in some patients with osteoarthritis.

“Arthroscopy is still valuable and you have to know when to use it,” said Dr. Marx, who is also director of the Foster Center for Clinical Outcome Research at HSS. “While I do not recommend arthroscopy as a treatment for an arthritic knee, it can be extremely helpful for people with arthritis who also have a co-existing knee problem such as a meniscal tear or a loose piece of cartilage that is causing the majority of their symptoms.”

In the study reported in the NEJM, investigators randomized 92 individuals to arthroscopic surgery and 86 to non-operative treatment for osteoarthritis of the knee. The non-operative treatments included one physical therapy session per week for twelve weeks with a home physical therapy program, patient education, and the step-wise use of acetaminophen, non-steroidal anti-inflammatory drugs, glucosamine and an injection of hyaluronic acid. The study did not identify any benefit in the group that received surgery.

Dr. Marx points out, however, that the study excluded patients who were believed to have a large meniscal tear based on clinical examination, or, in a small number of cases, identified through magnetic resonance imaging. “This study excluded people who the doctor thought needed arthroscopy for a meniscal tear. The doctor thought they would do well with surgery,” said Dr. Marx. “So, the only ones who are included are the ones who are not good candidates for the surgery because their symptoms were due only to arthritis and arthroscopy is not generally effective in that scenario.”

In other words, although the study showed a lack of efficacy of arthroscopy, it can be very useful in patients who may have osteoarthritis, but also another knee injury, such as a symptomatic meniscal tear. There are subtleties involved in clinical decision-making, commented Dr. Marx. Patients who are young, have mild osteoarthritis, a history of injury and clear meniscal pathology would be a good candidate for surgery and, in fact, would be unlikely to heal without the surgery. In contrast, patients who have symptoms that are only due to osteoarthritis are unlikely to benefit from arthroscopy.

Arthroscopic surgery is performed by orthopedic surgeons in many joints, most commonly the knee. The advantage of arthroscopy over traditional open surgery is that the joint does not have to be opened up fully. Instead, only two or three small incisions are made.

Dr. Marx, a member of the Sports Medicine and Shoulder Service at Hospital for Special Surgery, is also an associate professor of orthopedic surgery and associate professor of public health at Weill Cornell Medical College.


About HSS | Hospital for Special Surgery
HSS is the world’s leading academic medical center focused on musculoskeletal health. At its core is Hospital for Special Surgery, nationally ranked No. 1 in orthopedics (for the eighth consecutive year) and No. 3 in rheumatology by U.S. News & World Report (2017-2018). Founded in 1863, the Hospital has one of the lowest infection rates in the country and was the first in New York State to receive Magnet Recognition for Excellence in Nursing Service from the American Nurses Credentialing Center four consecutive times. The global standard total knee replacement was developed at HSS in 1969. An affiliate of Weill Cornell Medical College, HSS has a main campus in New York City and facilities in New Jersey, Connecticut and in the Long Island and Westchester County regions of New York State. In 2017 HSS provided care to 135,000 patients and performed more than 32,000 surgical procedures. People from all 50 U.S. states and 80 countries travelled to receive care at HSS. In addition to patient care, HSS leads the field in research, innovation and education. The HSS Research Institute comprises 20 laboratories and 300 staff members focused on leading the advancement of musculoskeletal health through prevention of degeneration, tissue repair and tissue regeneration. The HSS Global Innovation Institute was formed in 2016 to realize the potential of new drugs, therapeutics and devices. The culture of innovation is accelerating at HSS as 130 new idea submissions were made to the Global Innovation Institute in 2017 (almost 3x the submissions in 2015). The HSS Education Institute is the world’s leading provider of education on the topic on musculoskeletal health, with its online learning platform offering more than 600 courses to more than 21,000 medical professional members worldwide. Through HSS Global Ventures, the institution is collaborating with medical centers and other organizations to advance the quality and value of musculoskeletal care and to make world-class HSS care more widely accessible nationally and internationally.


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