Knee

What It Is

Discoid meniscus is a condition where a meniscus in the knee is abnormally shaped. Instead of being a crescent, it is thicker and shaped more like a half-moon or a full circle (American Academy of Orthopaedic Surgeons, n.d.). It is congenital, meaning it is present from birth, and it most often affects the lateral meniscus on the outside of the knee. It can sometimes be found in both knees (American Academy of Orthopaedic Surgeons, n.d.; Trisolino et al., 2022). A discoid meniscus is more prone to injury than a normally shaped meniscus. Some people with the condition go through their entire lives without a single problem, but a discoid meniscus is more likely to tear or get stuck in the knee (American Academy of Orthopaedic Surgeons, n.d.). Symptoms can begin in childhood.

Discoid Meniscus Anatomy

The meniscus is a wedge-shaped piece of cartilage. It acts as a shock absorber between the shinbone (tibia) and the thighbone (femur). It protects the articular cartilage covering the ends of your bones and helps the knee to bend and straighten easily.

There are two menisci in the knee: the lateral meniscus on the outside and the medial meniscus on the inside of the knee. When the menisci are healthy, they are shaped like a crescent moon.

The meniscofemoral ligaments attach the meniscus to the thighbone (femur), which helps stop it moving around inside your knee (American Academy of Orthopaedic Surgeons, n.d.). The meniscus has a poor blood supply, which is why tears are difficult to heal (American Academy of Orthopaedic Surgeons, n.d.).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

Treatment

Self-Care & Treatment

How to Manage Discoid Meniscus

1. No Symptoms, No Treatment

Sometimes a discoid meniscus is found by chance when the knee is checked for another problem. If it is not causing any symptoms, specific treatment may not be needed (American Academy of Orthopaedic Surgeons, n.d.; Trisolino et al., 2022).

2. Rehabilitation

I can support the rehabilitation your surgical team or physiotherapist sets, with exercises to improve knee movement and strength, help with swelling, and a gradual return to play or sport. See the My Approach tab for how I work.

If surgery is needed, follow your surgical team's own instructions on protecting the knee and getting around afterwards. Once the initial healing is complete, physical therapy exercises may be prescribed to help restore mobility and strength (American Academy of Orthopaedic Surgeons, n.d.).

Treatments you may want to discuss with your family doctor or nurse practitioner

Options outside my scope

Knee arthroscopy (keyhole surgery): if a discoid meniscus is causing pain, popping or other symptoms, an orthopaedic surgeon will usually recommend this. The surgeon inserts a small camera through small cuts around the knee and uses the pictures on a screen to guide small instruments. It is usually a day procedure, and most children have a general anaesthetic (American Academy of Orthopaedic Surgeons, n.d.).
Saucerisation: the main operation for a discoid meniscus, in which the surgeon trims and reshapes the meniscus into a more normal crescent shape. Any torn part may be trimmed away or, for some tears, repaired with stitches (American Academy of Orthopaedic Surgeons, n.d.; Trisolino et al., 2022).

How I can help (see the My Approach tab)

Supportive care after surgery, within your surgical team's limits
Help with swelling and stiffness
Exercises to restore knee movement and thigh strength
A gradual return to play and sport

Tips

Injuries to a discoid meniscus often happen with a twisting motion of the knee, for example in sports that involve pivoting or fast changes of direction (American Academy of Orthopaedic Surgeons, n.d.).
Children who have never had a major injury can still have popping and locking in the knee (American Academy of Orthopaedic Surgeons, n.d.).
Being unable to straighten the knee fully can be a sign of discoid meniscus (American Academy of Orthopaedic Surgeons, n.d.).
A torn meniscus often causes swelling and stiffness in the knee. The knee may also feel like it's going to give way or collapse.
Most people return to normal daily activities after surgery. However, if the whole meniscus has to be removed, there is a risk of continued pain and possibly early arthritis (American Academy of Orthopaedic Surgeons, n.d.).
Surgeons sometimes recommend avoiding sports with cutting movements that overstress the knee, such as soccer, tennis, basketball and football (American Academy of Orthopaedic Surgeons, n.d.).

Treatment

My Approach

A discoid meniscus sits deep inside the knee, so I can't treat it directly, and when it causes symptoms an orthopaedic surgeon leads the care. I support your recovery around that care. After an operation, I need your surgical team's okay before we start, and I work within their limits.

I start by asking what you've been cleared for, then assess knee movement, thigh and hip strength, swelling and walking. Parents are welcome to sit in, with their child's agreement.

Early After Surgery

Gentle work above the knee to help swelling drain, with cool applications in clinic, and I'll show you how to use ice safely at home
Work on the hips, back and other leg, and the shoulders if you're on crutches
Gentle kneecap movement and slow, pain-free bending and straightening, within your surgeon's limits
Thigh tightening and straight-leg raises when your team allows

Building Strength

Scar work once the wound has healed, and hands-on work for tight thigh and hamstring muscles
Squats, step-ups, stationary cycling and balance work, then hopping and jumping when you're ready
After a repair, a much slower build-up, with deep squats, twisting and pivoting waiting until your surgeon agrees
For children, play-based bodyweight exercise first, with light weights only later

If your knee locks and won't straighten, don't force it; get it checked. If it keeps clicking, locking or swelling as you do more, let your surgeon know.

What to Expect

Typical Course

Typical course: Once you're cleared, visits are usually once or twice a week, then weekly, then spaced out, with a reassessment at about 4 to 6 weeks. After trimming and reshaping, recovery usually takes a few weeks to a few months; after a repair it is slower, and your surgeon decides when pivoting sports can start.

What I Focus On

Working Within Your Surgeon's Limits

Swelling Control

Knee Movement

Staged Strengthening

Return to Play & Sport

Please read

When to See a Doctor First

Signs to Look Out For

The most common symptoms of a discoid meniscus or a torn discoid meniscus are (American Academy of Orthopaedic Surgeons, n.d.):

pain
stiffness or swelling
catching, popping or locking of the knee
a feeling that the knee is "giving way"
not being able to fully straighten the knee

See your family doctor or nurse practitioner if you or your child has these symptoms.

Sources

References

American Academy of Orthopaedic Surgeons (n.d.) Discoid meniscus. OrthoInfo. Available at: https://www.orthoinfo.org/diseases--conditions/discoid-meniscus/ (Accessed: 7 October 2026).
Trisolino, G., Stallone, S., Grassi, A. et al. (2022) 'The discoid lateral meniscus in children: a narrative review of pathology, diagnosis and treatment', Annals of Joint, 7, 38. doi: 10.21037/aoj-21-31

Massage therapy · Kitchener–WaterlooDiscoid Meniscus

What It Is

Discoid Meniscus Anatomy

Self-Care & Treatment

How to Manage Discoid Meniscus

1. No Symptoms, No Treatment

2. Rehabilitation

Treatments you may want to discuss with your family doctor or nurse practitioner

Tips

My Approach

Early After Surgery

Building Strength

Typical Course

When to See a Doctor First

Signs to Look Out For

References

Related Conditions

Book a session

Massage therapy · Kitchener–WaterlooDiscoid Meniscus

What It Is

Discoid Meniscus Anatomy

Self-Care & Treatment

How to Manage Discoid Meniscus

1. No Symptoms, No Treatment

2. Rehabilitation

Treatments you may want to discuss with your family doctor or nurse practitioner

Tips

My Approach

Early After Surgery

Building Strength

Typical Course

When to See a Doctor First

Signs to Look Out For

References

Related Conditions

Anterior Cruciate Ligament Rupture and Reconstruction

Patella Dislocation

Patellar Fracture

Patellar Tendon Tear

Book a session