Table 1.

Pediatric Research in Sports Medicine (PRiSM) Lateral Discoid Meniscus Classification System

Classification Component
Meniscal width/surface area
Incomplete
Near complete/complete
Meniscal height
Normal
Abnormal
Instability
Normal stability
Abnormal stability
In anterior half of meniscus
In posterior half of meniscus
In anterior and posterior meniscus
Tear type
No tear or tear in central portion/saucerization zone
Horizontal
Degenerative/complex/radial
Tear location
No tear or tear in central portion/saucerization zone
Anterior half
Posterior half
Anterior and posterior halves