the effusion and its size. This can also be an effective tool to guide treatment such as a joint aspiration.

MRI

Magnetic Resonance Imaging detects abnormalities of the bone or knee joint, such as damage to the ligaments, tendons or cartilage. Some injuries that include soft tissue damage that cannot be seen on X-Ray may require an MRI.

Blood tests

If one knee is swollen, red, and warm to the touch compared to the other knee, a doctor may be concerned about

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