Two-slice-touch rule (knee MRI)
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At the time the article was created Henry Knipe had no recorded disclosures.View Henry Knipe's current disclosures
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The two-slice-touch rule is a sign on MRI of the knee used to increase the sensitivity of diagnosing meniscal tears.
This rule states a meniscal tear is present if abnormal findings are present on two or more images - these do not have to be contiguous, e.g. can occur on sagittal and coronal slices but at the same anatomical location. The only exception to this rule applies to a meniscal root tear, for which abnormal signal in only one slice is considered highly specific for an underlying tear. A possible meniscal tear is present if abnormal findings are present on only one slice in other types of meniscal tear.
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