Two-slice-touch rule (knee MRI)

Last revised by Daniel J Bell on 15 Mar 2018

Citation, DOI, disclosures and article data

Citation:

Knipe H, Bell D, Tatco V, et al. Two-slice-touch rule (knee MRI). Reference article, Radiopaedia.org (Accessed on 02 Dec 2023) https://doi.org/10.53347/rID-32949

DOI:

https://doi.org/10.53347/rID-32949

Permalink:

https://radiopaedia.org/articles/32949

rID:

32949

Article created:

22 Dec 2014, Henry Knipe ◉ ◈

Disclosures:

At the time the article was created Henry Knipe had no recorded disclosures.

View Henry Knipe's current disclosures

Last revised:

15 Mar 2018, Daniel J Bell ◉

Disclosures:

At the time the article was last revised Daniel J Bell had no recorded disclosures.

View Daniel J Bell's current disclosures

Revisions:

4 times, by 4 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Sections:

Signs

Tags:

knee, meniscal, cases, refs

Synonyms:

Two-slice-touch rule

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.