Meniscal Extrusion in Young Athletes: Associated Knee Joint Abnormalities
Winston J. Rennie1 and
D. B. L. Finlay1
1 Both authors: Department of Radiology, University Hospitals of Leicester,
Leicester Royal Infirmary, Hospital Close, Infirmary Square-LE1 5WW, United
Kingdom.
Fig. 1 T1-weighted coronal image of right knee at midpoint in 20-year-old
asymptomatic male athlete shows medial meniscal extrusion of 5.7 mm. Meniscal
extrusion is measured by distance from perpendicular line to edge of tibial
plateau and edge of meniscus (white lines). Vertical tear of medial
meniscus and sclerosis of subarticular medial tibial plateau with small
marginal osteophyte indicating degenerative change are present. No joint
effusion is shown.
Fig. 2 T1-weighted coronal image of right knee at anterior end of
intercondylar notch in 41-year-old male control subject with medial joint pain
shows horizontal peripheral tear of medial meniscus (arrow). Small
joint effusion was present. Meniscal extrusion (3.5 mm) is shown.