TABLE III.
MRI-Defined Osteophytes, Subchondral Cysts, and Meniscal Tears Among 724 Knees by Compartment
| Medial Compartment* | Lateral Compartment* | Patellofemoral Compartment* | Overall (Any Compartment)* | |
| Osteophytes | ||||
| No osteophytes | 284 (39.2) | 314 (43.4) | 317 (43.8) | 203 (28.0) |
| Osteophyte of ≤5 mm | 299 (41.3) | 301 (41.6) | 344 (47.5) | 341 (47.1) |
| Osteophyte of >5 mm | 141 (19.5) | 109 (15.1) | 63 (8.7) | 180 (24.9) |
| Subchondral cysts | ||||
| Normal | 636 (87.9) | 661 (91.3) | 554 (76.5) | 472 (65.2) |
| Small (≤1 cm) | 79 (10.9) | 61 (8.4) | 164 (22.7) | 236 (32.6) |
| Large (>1 cm) | 9 (1.2) | 2 (0.3) | 6 (0.8) | 16 (2.2) |
| Meniscal abnormalities | ||||
| Normal | 110 (15.2) | 219 (30.3) | NA | 82 (11.4) |
| Intrasubstance abnormality only | 390 (54.0) | 378 (52.4) | NA | 355 (49.2) |
| Simple, nondisplaced tear | 108 (15.0) | 69 (9.6) | NA | 128 (17.7) |
| Complex, macerated tear | 114 (15.8) | 56 (7.8) | NA | 157 (21.7) |
| Meniscal extrusion | ||||
| None | 27 (3.7) | 340 (47.1) | NA | 15 (2.1) |
| <5 mm | 587 (81.3) | 362 (50.1) | NA | 580 (80.3) |
| ≥5 mm | 108 (15.0) | 20 (2.8) | NA | 127 (17.6) |
*
The values are given as the number of knees with the percentage in parentheses. NA = not applicable.