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Table 2 Characteristic MRI findings in MMPRTs

From: Meniscus extrusion is a predisposing factor for determining arthroscopic treatments in partial medial meniscus posterior root tears

 

Pullout repairs (n = 35)

Nonoperative managements (n = 38)

P-value

Coronal images

 Cleft sign (%)

8 (22.9)

4 (10.5)

0.211a

 Giraffe neck sign (%)

9 (25.7)

7 (18.4)

0.574a

 MM extrusion (mm)

3.49 ± 0.82

2.48 ± 0.60

< 0.001*b

 MM extrusion > 3 mm (%)

24 (68.6)

7 (18.4)

< 0.001*a

 Root irregularity (%)

16 (45.7)

12 (31.6)

0.238a

 Bone marrow spot (%)

21 (60.0)

21 (55.3)

0.813a

Sagittal images

 Ghost sign (%)

7 (20.0)

8 (21.1)

1.000a

 Ocarina sign (%)

31 (88.6)

31 (81.6)

0.519a

 Bone marrow spot (%)

13 (37.1)

19 (50.0)

0.346a

Axial images

 Radial tear sign (%)

5 (14.3)

4 (10.5)

0.723a

  1. Data of medial meniscus (MM) extrusion are displayed as a mean ± standard deviation. MRI, magnetic resonance imaging; MMPRT, medial meniscus posterior root tear. aFisher’s exact test. bMann–Whitney U test. *Significant difference