Overview
Meniscus injury is one of the most common knee referrals in outpatient physiotherapy, and the bedside examination is where most diagnoses are first framed. No single meniscus test is accurate enough to rule a tear in or out on its own. The clinically useful approach is to perform a small panel of tests, weight the result by the patient's history and the joint line findings, and decide whether imaging or onward referral adds value.
This guide walks through the meniscus tests with the strongest evidence (McMurray, Apley, Thessaly, Ege's, joint line tenderness, and a few supporting manoeuvres), how to perform each one cleanly, what the published sensitivity and specificity actually say, and how to cluster them into a defensible clinical impression.
Why no single meniscus test is enough
The menisci are wedge-shaped fibrocartilaginous discs that sit between the femoral condyles and the tibial plateau. Their job is to deepen the articular surface, distribute load, and lubricate the joint. Only the peripheral third of each meniscus has a meaningful blood supply, which is why peripheral red-zone tears can heal and central white-zone tears typically cannot.
Most clinical meniscus tests are mechanical: they try to provoke pain, a click, a clunk, or a sense of catching by trapping the torn fragment between the tibia and femur. The challenge is that the same mechanical signals can come from cartilage, capsule, ligament, or osteoarthritic joints. That is why every meta-analysis of meniscus testing reaches the same conclusion: individual sensitivity and specificity values are moderate, accuracy improves when several tests are combined, and the patient's history is at least as important as any single manoeuvre.
Hegedus and colleagues' 2007 systematic review on physical examination of the knee, and Smith and colleagues' 2015 meta-analysis, both place McMurray, Apley, joint line tenderness, and Thessaly in the moderate-accuracy band. None of them is good enough to anchor a diagnosis on its own. The practical move is to think of meniscus testing as a cluster decision, not a single positive or negative.
History clues that point to a meniscus tear
The classic meniscus history starts with a twisting injury on a planted foot, often with the knee partially flexed and weight bearing. The patient may feel or hear a pop, but pop is non-specific (cruciate ligaments produce it too). Effusion in a meniscus tear typically appears slowly, over the day after injury rather than immediately, which is one of the most useful differentials against ACL tear where the effusion is fast and large.
Mechanical symptoms are the meniscus story: locking, catching, or the knee giving way mid-step on a particular motion. True locking, where the knee will not fully extend, is uncommon but specific. Patients often describe deep medial or lateral joint line pain with squatting, twisting, descending stairs, or getting up from sitting cross-legged. Older patients with degenerative meniscus tears may present without any specific injury and describe a more gradual, deep, mechanical knee pain.
Red flags that should shift you toward imaging or referral rather than further bedside testing include a locked knee that has not reduced, suspected concurrent ACL injury, severe pain out of proportion to load, or any history of significant trauma in a younger athlete.
McMurray and Apley: the foundation tests
Most clinicians start with McMurray and Apley because they are quick, well-described, and reasonable screens when performed carefully. Neither is highly sensitive or specific on its own. The findings are most informative when they reproduce the patient's familiar pain rather than provoking new pain.
In this sectionMcMurray testApley grinding test
McMurray test
Position the patient supine with the hip and knee maximally flexed. Palpate the joint line. To bias the medial meniscus, externally rotate the tibia while extending the knee with a valgus stress; to bias the lateral meniscus, internally rotate the tibia while extending with a varus stress. A painful, palpable click or clunk along the joint line is a positive test. A click without pain is much less meaningful.
Systematic reviews place McMurray's sensitivity around 50 to 70 percent and specificity around 70 to 90 percent depending on examiner experience and the population studied. The take-home is that a negative McMurray does not rule out a tear, and a vague positive without joint line pain is not strong evidence either. The PhysioHub assessment page has the video demonstration and the full study data.
Apley grinding test
Position the patient prone with the knee flexed to 90 degrees and stabilize the thigh. Two phases: first distract the tibia and rotate it medially and laterally to stress the ligaments; then compress the tibia downward and rotate it again to stress the menisci. Pain or clicking with compression-and-rotation suggests meniscal pathology; pain that is worse with distraction suggests a ligamentous source. Compare the location and quality of pain in each phase rather than treating it as a yes/no test.
Modern meta-analysis data are weaker than the textbook tradition implies. Apley should not stand alone as a diagnostic test. Its strength is the distraction-versus-compression contrast, which helps you decide whether to think ligament or meniscus. See the Apley stress test page for the full procedure and references.
Thessaly and Ege: the weight-bearing options
Supine tests load the joint differently from how the patient actually injures it. Two weight-bearing alternatives, Thessaly and Ege's (the weight-bearing McMurray), try to reproduce symptoms in a more functional position. They are more provocative and may be unsafe in acute, irritable, or locked knees.
In this sectionThessaly testEge's test (weight-bearing McMurray)
Thessaly test
The patient stands flat-footed on the tested leg while holding the examiner's hands for balance. Flex the tested knee to roughly 5 degrees and ask the patient to internally and externally rotate the knee and body three times. Repeat at 20 degrees flexion if the 5-degree version is non-provocative and the patient is safe to do it. A positive test is joint line pain, locking, catching, or a sense of giving way during the rotation.
The Karachalios 2005 introduction of the Thessaly test reported very strong accuracy (sensitivity 90 to 92 percent, specificity 96 to 97 percent), but later work in less selected populations (Blyth 2015) showed substantially weaker numbers. Smith's 2015 meta-analysis lands it in the moderate band overall. Use Thessaly as a useful component, not the standalone single test. The Thessaly test page has the full diagnostic-accuracy table.
Ege's test (weight-bearing McMurray)
The patient squats with the feet externally rotated to bias the medial meniscus, then repeats the squat with the feet internally rotated to bias the lateral meniscus. Pain or a click over the joint line during the squat is positive. The mechanism mirrors McMurray's, but the load is functional, which often makes it more useful in chronic and degenerative tears.
Ege's data are promising but limited (Akseki 2004 reports sensitivity in the 60s and specificity in the 80s). Avoid it in acutely irritable knees, patients who cannot squat safely, and anyone with a locked knee. The Ege's test page has the procedure and study data.
Joint line tenderness, bounce home, and the duck walk
Three older but still clinically useful manoeuvres round out the panel. None is specific enough to anchor a diagnosis, but each adds context.
Joint line tenderness is the easiest test to perform: palpate the medial then lateral joint line from anterior to posterior and ask whether tenderness matches the patient's familiar pain. Smith 2015 found pooled sensitivity of about 83 percent and specificity of 83 percent, with a likelihood ratio of roughly 4.9. That is one of the better single-test signals in the meniscus literature. Crucially, Magee notes that joint line tenderness can be absent in up to half of meniscus injuries, particularly with concurrent ACL tears, so a negative finding does not rule out the diagnosis. See the joint line tenderness page.
Bounce home tests for a mechanical block to extension. Passively flex the patient's knee fully, then allow it to extend while cupping the heel. A rubbery block, rebound, or failure to reach full extension is positive. The test is non-specific (loose bodies and effusions can produce the same finding), but it is one of the few examination tools for true mechanical locking. Full procedure here.
Duck walk (Childress sign) and the historical Finochietto jump sign are weight-bearing or palpation manoeuvres that try to elicit posterior horn symptoms. Both lack robust modern diagnostic data and should be treated as low-value adjuncts. Use them only when better-studied tests are inconclusive or contraindicated.
Putting the cluster together
In this sectionA practical bedside clusterWhen to image and when to refer
The most defensible bedside diagnosis of a meniscus tear comes from a small cluster of findings rather than any single positive test. A reasonable working bundle:
A practical bedside cluster
1. History fits the mechanism. Twisting injury on a loaded knee, slow-onset effusion, mechanical symptoms (locking, catching, or giving way on rotation).
2. Joint line tenderness is present on the side that matches the patient's pain.
3. At least one provocative test is positive with reproduction of the patient's familiar pain. McMurray and Apley first, Thessaly or Ege if the patient tolerates weight bearing.
4. No competing diagnosis better explains the picture. Rule out ACL/PCL injury, OA, patellofemoral pain, and referred hip pain.
When to image and when to refer
Image when management would change: a locked knee that has not reduced, suspected concurrent ligament injury, an athlete planning return to sport, or persistent mechanical symptoms after 4 to 6 weeks of appropriate physiotherapy. MRI is the standard reference for meniscus pathology, but remember the asymptomatic positive rate in older patients is high; clinical correlation matters.
Refer to orthopaedics for ongoing locking, suspected acute large tear in a younger athlete, failure of conservative management, or any case where the imaging finding does not match the clinical picture and a surgical opinion would inform the patient's decision.
| Test | Sens. | Spec. | LR (+) | Source |
|---|---|---|---|---|
| McMurray | 50-70% | 70-90% | ~1.7 | Hegedus 2007 |
| Apley grinding | ~41% | ~86% | ~2.9 | Smith 2015 |
| Thessaly (original) | 90-92% | 96-97% | ~27 | Karachalios 2005 |
| Thessaly (pragmatic) | ~66% | ~39% | ~1.1 | Blyth 2015 |
| Joint line tenderness | ~83% | ~83% | ~4.9 | Smith 2015 |
| Ege's test | ~67% | ~81% | ~3.5 | Akseki 2004 |
| Bounce home | Low/variable | Low/variable | Non-diagnostic | Magee 2014 |
I think I tore my meniscus, what should I do?
If you are a patient who suspects a meniscus tear rather than a clinician, this section is the short version. The bedside tests above are designed for trained physiotherapists, not self-assessment, but a few patterns are worth knowing.
Signs that point to a meniscus injury: a twisting injury on a planted foot, deep pain on the inside or outside of the knee, slow swelling that appears overnight rather than within minutes, a sense of locking or catching when you bend or straighten the knee, or pain when squatting or getting up from sitting cross-legged. Many people describe the knee feeling like it briefly “gives way” on certain movements.
Things you should NOT do: avoid testing yourself with weight-bearing manoeuvres like deep squats or twisting on the painful leg, especially if your knee feels locked or unstable. You can make a partial tear worse. Avoid heavy loading, running, or sports until a clinician has assessed the joint.
When to see a physiotherapist or GP: if the knee is locked and will not fully straighten, if you cannot bear weight, if the swelling is large and developed within hours of the injury, or if symptoms persist beyond two weeks of relative rest. Most isolated meniscus injuries are managed conservatively with physiotherapy. Surgery is reserved for specific tear patterns where rehabilitation has not restored function.
The honest answer about “home tests”: there is no reliable self-test for a meniscus tear. Videos online showing the Thessaly test or McMurray test performed on yourself are not safe in an irritable knee and the results are unreliable without a trained examiner. Use the symptom pattern above to decide whether to book an appointment, and let the clinician do the testing.
Common questions
Real questions students and clinicians ask.
- What is the most accurate meniscus test?
- AThere is no single most-accurate meniscus test in the literature. Joint line tenderness and Thessaly have the strongest single-test numbers in pooled data, but their individual accuracy is still only moderate. The clinically useful approach is to combine history, joint line tenderness, and at least one provocative test (McMurray, Apley, Ege's) and treat them as a cluster.
- What is the difference between McMurray and Apley?
- AMcMurray is performed supine with the hip and knee flexed; you provoke the meniscus by rotating the tibia and extending the knee under valgus or varus stress. Apley is performed prone with the knee at 90 degrees and uses a compression-versus-distraction contrast to separate meniscus from ligament pain. They test similar tissues but the supine versus prone position and the compression-distraction contrast give them complementary roles in the examination.
- What does a positive McMurray test feel like?
- AA truly positive McMurray reproduces a painful click, clunk, or thud along the joint line at the moment of tibial rotation and knee extension. The pain should match the patient's familiar symptom rather than be a new pain introduced by the manoeuvre. A click on its own, without pain or without the patient recognising the sensation, is much weaker evidence of a meniscus tear.
- Can you test for a torn meniscus at home?
- ANo reliable self-test for a meniscus tear exists. The published meniscus tests (McMurray, Apley, Thessaly, Ege's) are designed for an examiner to perform on the patient, and weight-bearing provocations like Thessaly can worsen a partial tear if performed on an irritable knee. The most useful self-monitoring is symptom pattern: deep joint-line pain, slow-onset swelling overnight, mechanical locking or catching with twisting, and pain on squatting are all suggestive. See a physiotherapist or GP for definitive testing.
- How do I tell a meniscus tear from an ACL tear at the bedside?
- AEffusion timing is the most useful single clue. ACL effusions appear within hours (haemarthrosis); meniscus effusions appear overnight (synovial). ACL injuries are usually accompanied by a feeling of immediate instability and inability to continue the activity, whereas meniscus injuries often allow continued play with mechanical symptoms developing later. Add ACL-specific tests (Lachman, anterior drawer, pivot shift) and the picture clarifies.
- Can I perform meniscus tests on an acutely locked knee?
- AAvoid provocative weight-bearing tests like Thessaly, Ege's, and duck walk on a locked or highly irritable knee. Joint line tenderness and bounce home are safer and still informative. A locked knee that does not reduce is an imaging and orthopaedic-referral decision rather than a continued bedside examination.
- Is the Thessaly test still useful given the weaker recent data?
- AYes, as a component of a cluster, not as a standalone diagnostic. The original 90-percent accuracy figures came from a selected specialist population; pragmatic primary-care data are lower. Thessaly is still a useful functional, weight-bearing test that adds information beyond supine examination, particularly in patients with chronic or degenerative tears.
- Which meniscus test is best for the medial meniscus?
- AThere is no single best test for an isolated medial-versus-lateral meniscus tear, but the medial meniscus is biased by external tibial rotation during McMurray and by externally rotated feet during Ege's squat. Medial joint line tenderness localises the pain. Combine medial-biased McMurray, Ege's with feet out, and medial joint line palpation; if all three are positive and the history fits, the cluster favours a medial tear.
References
- Hegedus EJ, Cook C, Hasselblad V, Goode A, McCrory DC (2007). Physical examination tests for assessing a torn meniscus in the knee: a systematic review with meta-analysis. Journal of Orthopaedic & Sports Physical Therapy.
- Smith BE, Thacker D, Crewesmith A, Hall M (2015). Special tests for assessing meniscal tears within the knee: a systematic review and meta-analysis. Evidence-Based Medicine.
- Karachalios T, Hantes M, Zibis AH, Zachos V, Karantanas AH, Malizos KN (2005). Diagnostic accuracy of a new clinical test (the Thessaly test) for early detection of meniscal tears. Journal of Bone and Joint Surgery (American).
- Akseki D, Ozcan O, Boya H, Pinar H (2004). A new weight-bearing meniscal test and a comparison with McMurray's test and joint line tenderness. Arthroscopy.
- Blyth M, Anthony I, Francq B, Brooksbank K, Downie P, Powell A, Jones B, MacLean A, McConnachie A, Norrie J (2015). Diagnostic accuracy of the Thessaly test, standardised clinical history and other clinical examination tests (Apley's, McMurray's and joint line tenderness) for meniscal tears in comparison with magnetic resonance imaging diagnosis. Health Technology Assessment.
- Magee DJ (2014). Orthopedic Physical Assessment, 6th edition. Saunders.