Meniscus Tear: Likelihood Ratios

Introduction: A tear of the lateral or medial menisci of the knee joint, usually traumatic.

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The likelihood ratios of findings for Meniscus Tear are listed below. See the left navigation bar to change the display.

Good Positive and Negative Likelihood Ratios

MRI

5.6

0.2

sensitivity lower for LM, specificity lower for MM

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Systematic review. Radiology 2003 PMID: 12601211

McMurray Test

17.3

0.5

Flex the hip and knee maximally. Apply a valgus (abduction) force to the knee while externally rotating the foot and passively extending the knee. An audible or palpable snap during extension suggests a tear of the medial meniscus. For the lateral meniscus, apply a varus (adduction) stress during internal rotation of the foot and passive extension of the knee.

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Poorly Diagnostic Findings

Joint Line Tenderness

1.1

0.8

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229