KNEE MRI MENISCUS EXTRUSIONS ARE POINTING YOU TO A ROOT TEAR

THE MOST OBVIOUS CAUSE

• Loss of Joint Space from degeneration and cartilage loss is the most obvious cause.
   
• The reduction in joint space results in the meniscus being ” squeezed” out of the joint like toothpaste.
   
• BUT…there is another important cause to look for..

ALWAYS LOOK AT THE POSTERIOR HORN ROOT FOR A TEAR

• The meniscal roots fix the meniscus to the tibia.
   
• They are very important for maintaining stability of the meniscus and transmission of stress.
   
• Root tears result in accelerated joint degeneration.
   
• Posterior Root tears are a common cause of meniscus extrusion.

THE KEY TAKE AWAY

• When there is meniscal extrusion.
   
• There may be loss of joint space which may be the only cause BUT…
   
• Always look at the posterior horn root for a tear.

KNEE MRI MENISCUS EXTRUSION: VIEW IMAGES

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