Meniscal Test Literature

For Medical Students

What the Question Was

The question was how to detect a torn meniscus by hand, by loading and rotating the compartment so that a torn fragment catches. 4.9.3 covers the McMurray test.

The tests that followed all use the same idea, which is compression plus rotation, applied in different positions. 4.9.5 covers the Apley compression test.

The question behind the later tests was whether a weightbearing version outperforms a couch version, since the meniscus is loaded standing. 4.9.4 covers the Thessaly test.

What It Showed

The work established that these tests are specific and insensitive, so a positive result is useful and a negative one is weak.

It established that joint line tenderness is the most sensitive single finding and the least specific, which is the complementary profile. 4.9.2 covers joint line tenderness.

It did not establish that any one test replaces the others, which is why a combination is used. 4.1.4 covers the structured approach.

MRCS Level

What Was Done

McMurray described the rotation and extension manoeuvre that carries his name, and it remains the test most often taught first. 4.9.3 covers the technique.

Apley described the compression and rotation test performed prone, which separates compression from the ligament stress a rotation in extension also applies. 4.9.5 covers the technique.

Childress and Ege described squat and weightbearing rotation tests, moving the provocation into a loaded position. 4.9.6 covers the squat test.

Karachalios described a weightbearing rotation test at a set flexion angle, which is the most studied of the standing tests. 4.9.4 covers the Thessaly test.

Comparative accuracy work set each test and their combinations against arthroscopy, and clustered findings were assessed as a group rather than individually.

What It Showed

The comparative work established the profile that holds across the tests, which is good specificity and poor sensitivity, with joint line tenderness the mirror image. 4.9.2 covers joint line tenderness.

It established that combinations outperform any single test, which is the argument for a sequence rather than a favourite. 4.1.4 covers the structured approach.

It established that the tests perform worse in a degenerate knee, where the findings are produced by the arthritis as well as by any tear. 4.9.11 covers the examination in the worn knee.

It established that a weightbearing test is not decisively better than a couch test, which was the question the standing tests were designed to answer. 4.9.4 covers the Thessaly test.

No sensitivity, specificity or likelihood ratio appears on this page, under decision 023 and decision 022 together. The ranking is what is recalled reliably; a specific percentage written from memory would look exactly like a correct one.

FRCS Level

What It Showed

At decision level the useful product is the combination's profile and the fact that it degrades in the population most often examined.

A cluster of positive findings in a young knee with a mechanical history is strong, and the examination is close to sufficient. 4.9.1 covers the clinical presentation.

The same cluster in a worn knee is weak, because the degenerate joint produces the findings without a treatable tear. 4.9.11 covers the examination in the worn knee.

A locked knee is a clinical diagnosis the accuracy literature does not describe well, because the studies measured tear detection rather than block detection. 4.9.8 covers mechanical locking.

The root tear emerged as a pattern the classical tests were not designed for, which is why it is examined separately. 4.9.9 covers meniscal root tears.

What It Changed

It replaced a search for the best test with the use of a cluster, which is the main practical change. 4.1.4 covers the structured approach.

It established the examination's role in the worn knee as weak, which moved the decision there towards the symptoms and the imaging. 4.9.11 covers the examination in the worn knee.

It supported a lower imaging threshold in the degenerate knee and a higher one in the young knee with a convincing cluster. 4.1.6 covers that relationship.

It left the locked knee as a clinical judgement, which is where it remains. 4.9.8 covers mechanical locking.

Fellowship Level

What It Changed

At fellowship level this literature's effect is mostly a warning about what the tests cannot do in the population that presents most.

The tests were validated against arthroscopy in knees selected for arthroscopy, which inflates their apparent performance relative to a clinic population. 4.9.1 covers the clinical presentation.

A degenerate tear is found in a high proportion of worn knees without being the symptom source, so a positive test in that group answers a question nobody asked. 4.9.11 covers the examination in the worn knee.

The root tear's clinical signature is different from the classical tear's, and the classical tests do not detect it reliably. 4.9.9 covers meniscal root tears.

Extrusion is the mechanical consequence that matters in the worn knee and it is clinically undetectable. 4.9.10 covers meniscal deficiency.

The examination's value in this chapter is therefore largely negative, which is an honest and uncomfortable conclusion. 4.1.6 covers that relationship.

What to Read Now

Chapter 3.17 carries the meniscal biomechanics literature, which is the explanation for why a root or a radial tear behaves as it does.

The diagnostic accuracy literature is where this page's omitted figures belong, and they can be added into the individual test pages. 4.9.3 covers the McMurray test.

The degenerate meniscal tear literature is the reading for the worn knee question, and it is the body of work most relevant to practice. 4.9.11 covers that examination.

The root tear literature is the reading for the pattern the classical tests miss. 4.9.9 covers meniscal root tears.

No reference list appears on this page. No source was retrieved, and under decision 022 a named author with a described finding is the most this process can honestly supply, with no year, journal or citation attached.