Is it knee arthritis or a meniscus tear? How can I tell?

How the two usually differ

• Start: a meniscus tear in a younger knee often follows a clear twist, squat or pivot; arthritis creeps in over months or years
• Mechanical symptoms: a torn flap can catch, lock the knee or make it give way suddenly; arthritis more often grinds and stiffens
• Pain pattern: a tear gives sharp, localised pain on twisting or deep squatting; arthritis gives a broader ache after use and after rest
• Swelling: a fresh tear may swell within a day; arthritis swells on and off after busy days

Why the line blurs after middle age

As the knee ages, the meniscus becomes drier and can tear with very little force, such as standing up from sujood or a low majlis seat. These degenerative tears are extremely common in knees with osteoarthritis, and also in people with no pain at all. So an MRI showing a tear in a knee with arthritis does not necessarily mean the tear is the cause of the symptoms.

Why it matters for treatment

For a degenerative tear in an arthritic knee, research has shown that keyhole surgery to trim the meniscus generally gives no lasting advantage over a structured exercise programme, and arthroscopic washout is not recommended for osteoarthritis alone. Treatment is therefore usually the same as for the arthritis: strengthening, weight management, pain relief and sometimes an injection.

There are exceptions. A displaced tear that genuinely locks the knee, a meniscal root tear in a knee with little arthritis, or a traumatic tear in a younger, active patient may benefit from arthroscopy or repair.

Getting a clear answer

The distinction comes from the story, a careful examination and the right imaging, starting with standing X-rays. At Aman Hospital in Doha, Dr. Gelber looks at which came first, the tear or the wear, and explains whether surgery would help your knee or whether a non-surgical plan is the more reliable route.