Quick verdict: which test, when
In this sectionPick McMurray whenPick Apley whenPick Thessaly when
No single meniscus test is accurate enough to anchor a diagnosis on its own. The clinically defensible move is to combine a short cluster (history, joint line tenderness, and one or two provocative tests) rather than rely on any single result. That said, when you only have time for one or two manoeuvres, the choice depends on the patient in front of you.
Pick McMurray when
The patient is supine and the knee is irritable but not locked. McMurray is the supine workhorse: quick, well-described, and safe to perform on an acutely painful knee. Pooled sensitivity sits around 50 to 70 percent and specificity around 70 to 90 percent, so a negative result is not strongly reassuring but a positive one (with familiar joint-line pain reproduced) adds meaningful diagnostic weight.
Pick Apley when
You are uncertain whether the pain is meniscal or ligamentous and you can position the patient prone. Apley's distinctive feature is the distraction-versus-compression contrast: distraction stresses ligaments, compression with rotation stresses the menisci. Comparing the two phases gives you tissue-localisation information that supine tests cannot.
Pick Thessaly when
The patient can safely weight-bear and the knee is not acutely locked. Thessaly loads the joint in a functional position, which often reproduces chronic and degenerative tear symptoms that supine tests miss. The original Karachalios 2005 data are unusually strong (sensitivity 90 to 92 percent, specificity 96 to 97 percent), but the pragmatic Blyth 2015 data are more modest, so treat Thessaly as a high-yield component of a cluster, not a stand-alone diagnostic.
Side-by-side comparison
The four most decision-relevant attributes are position, mechanism of provocation, pooled diagnostic accuracy, and when the test is unsafe to perform.
| Attribute | McMurray | Apley | Thessaly |
|---|---|---|---|
| Patient position | Supine, hip and knee flexed | Prone, knee flexed to 90° | Standing, weight-bearing on tested leg |
| Mechanism | Tibial rotation + extension with valgus/varus | Compression vs distraction with rotation | Internal/external rotation under bodyweight |
| Sensitivity | 50-70% | ~41% | 66-92% (varies) |
| Specificity | 70-90% | ~86% | 39-97% (varies) |
| Positive LR | ~1.7 | ~2.9 | ~1.1-27 (varies) |
| Best for | Acutely irritable knees in supine; quick screen | Differentiating meniscus from ligament pain | Chronic/degenerative tears; functional load |
| Avoid in | Already-locked knee | Patients who cannot tolerate prone position | Locked knee, acutely painful knee, balance issues |
Why no single test is the right answer
The honest answer to “which meniscus test is best?” is that the question is malformed. Every systematic review on this topic reaches the same conclusion: individual sensitivity and specificity values for the major meniscus tests 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 and Smith and colleagues' 2015 meta-analysis both place McMurray, Apley, joint line tenderness, and Thessaly in the moderate-accuracy band. Joint line tenderness has the strongest single-test likelihood ratio (~4.9) but is also commonly absent in concurrent ACL injuries. Thessaly's original specificity was very high (~97 percent), but pragmatic re-evaluations in less selected populations bring it down dramatically. The implication: the test that wins in one study population loses in another.
This is why the comparison framing is less useful than the cluster framing. The right question is not “which test do I do?” but “which set of tests do I do, and how do they reweight the post-test probability of a tear?”
What about Ege's test and joint line tenderness?
Ege's test (weight-bearing McMurray) deserves a mention as a fourth option. The patient squats with feet externally rotated (medial meniscus bias) and again with feet internally rotated (lateral bias). Akseki 2004 reports sensitivity in the 60s and specificity in the 80s. Like Thessaly, Ege's is functional and weight-bearing, so it is more provocative for chronic and degenerative tears, but it is unsafe in acutely irritable knees or anyone who cannot squat safely. Full procedure on the Ege's test page.
Joint line tenderness is not really “a test” in the same sense as the others, but it has the strongest single-test likelihood ratio in the meniscus literature (~4.9 per Smith 2015). It should be part of every meniscus examination and is the test most likely to actually change your post-test probability if positive. Magee 2014 notes that joint line tenderness can be absent in up to half of meniscus injuries with concurrent ACL tears, so a negative finding does not rule out a tear. See the joint line tenderness page.
A practical bedside decision tree
In this sectionAcute, irritable, possibly locked kneeChronic, mechanical, degenerative-pattern painUncertain whether meniscus or ligament
Use this short flow to pick tests on the day, based on the patient in front of you.
Acute, irritable, possibly locked knee
Joint line tenderness only. Add McMurray gently if the knee tolerates flexion and rotation, but stop at the first sign of guarding. Avoid Apley (prone position is awkward and uncomfortable on an acutely swollen knee). Avoid Thessaly and Ege's (weight-bearing risk). If locked, this is an imaging and referral decision, not a continued bedside examination.
Chronic, mechanical, degenerative-pattern pain
Joint line tenderness, McMurray, and Thessaly. The supine test plus a functional weight-bearing test together cover more of the loading spectrum, which is what catches chronic and degenerative tears that supine examination misses. Add Ege's if you want a second weight-bearing data point.
Uncertain whether meniscus or ligament
Joint line tenderness, McMurray, and Apley. Apley's distraction-versus-compression contrast is the differential tool: compression-positive points toward meniscus, distraction-positive points toward ligament. Combine with ACL-specific testing (Lachman, anterior drawer, pivot shift) to formally exclude ligament injury.
Common questions
Real questions students and clinicians ask.
- Which meniscus test is most accurate?
- AThere is no single most-accurate meniscus test. Joint line tenderness has the strongest single-test likelihood ratio in pooled data (~4.9). Thessaly's original numbers were very high (sensitivity 90-92%, specificity 96-97%) but pragmatic re-evaluations are much lower. The clinically defensible approach is to combine several tests as a cluster rather than rely on any single result.
- Should I do McMurray or Apley first?
- AMcMurray first if the patient is already supine and the knee is irritable. Apley second if you want to differentiate meniscus from ligament pain, because Apley's compression-versus-distraction contrast gives tissue-localisation information that McMurray does not. If the patient is comfortable in both positions, doing both is informative.
- Is Thessaly more accurate than McMurray?
- AIt depends on the population studied. Karachalios 2005's original specialist-population data showed Thessaly outperforming McMurray substantially. Blyth 2015's pragmatic primary-care data showed Thessaly's specificity dropping to ~39%, which is worse than McMurray. The honest answer is that Thessaly is best treated as a useful component of a cluster rather than a stand-alone replacement for McMurray.
- Can I skip joint line tenderness?
- ANo. Joint line tenderness has the strongest single-test likelihood ratio of any meniscus test in the pooled literature, it is quick to perform, and it is safe on irritable knees. It should be part of every meniscus examination. Be aware that it can be absent in tears with concurrent ACL injury, so a negative finding does not rule out a tear.
- What's the difference between Thessaly and Ege's test?
- ABoth are weight-bearing meniscus tests. Thessaly is a single-leg stance with rotation through the knee, performed at roughly 5° and then 20° of knee flexion. Ege's is a squat with externally then internally rotated feet, biasing medial then lateral meniscus. Thessaly emphasises rotation under load; Ege's emphasises compression under load. Use either or both depending on which the patient can perform safely.
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).
- 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.
- 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.
- Magee DJ (2014). Orthopedic Physical Assessment, 6th edition. Saunders.