What does "Moderate effusion" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
"Moderate effusion" refers to a situation where there is a fair amount of fluid that has built up in a space in the body where it shouldn't normally be. This can happen in various parts of the body, such as the knee, the chest, or the abdomen. It's like when a water balloon fills up, but in this case, it's a part of the body filling up with fluid.
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