Lab case 416 interpretation


Volume of 25 ml is large, normal amount of synovial fluid in a knee joint is 0.5 to 4 ml. This indicates effusion. The knee joint is one of the largest joints in the body and it can accommodate around 100 ml of synovial fluids in cases of massive severe effusion.

That tells us that there is abnormal amount of fluid in the joint but it doesn’t help in detecting the cause.

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