What is edema?
Edema is the accumulation of clear, water-like fluid inside tissue. Pathologists often use the term edematous to describe the appearance of edema under a microscope. Edema develops when a specialized type of fluid called serum leaks out of blood vessels and into the surrounding tissue. Edema may be caused by physical trauma, infection, surgery, or radiation therapy. Edema may also be seen in tissue surrounding a tumour.
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