TABLE 2.
Osteochondral Lesion Measurements on MRI vs During Arthroscopya
| Measurement | Result | P Value |
|---|---|---|
| Lesion area | ||
| Lesion area, mm2, mean ± SD | .03 | |
| MRI | 42.2 ± 30.5 | |
| Arthroscopy | 28.6 ± 23.1 | |
| MRI OLT size vs arthroscopic size, % | ||
| Overestimated | 53.3 | |
| Underestimated | 24.4 | |
| Coronal plane | ||
| Lesion diameter, mm, mean ± SD | .03 | |
| MRI | 6.1 ± 2.6 | |
| Arthroscopy | 4.9 ± 2.3 | |
| MRI OLT size vs arthroscopic size, % | ||
| Overestimated | 48.9 | |
| Underestimated | 26.7 | |
| Sagittal plane | ||
| Lesion diameter, mm, mean ± SD | .05 | |
| MRI | 8.0 ± 3.6 | |
| Arthroscopy | 6.3 ± 3.6 | |
| MRI OLT size vs arthroscopic size, % | ||
| Overestimated | 46.7 | |
| Underestimated | 28.9 |
aMRI, magnetic resonance imaging; OLT, osteochondral lesion of the talus. Underestimated: MRI lesion size was smaller than arthroscopic lesion size. Overestimated: MRI lesion size was larger than arthroscopic lesion size.