Seroma

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A seroma is a pocket of clear serous fluid that sometimes develops in the body after surgery. When small blood vessels are ruptured, blood plasma can seep out; inflammation caused by dying injured cells also contributes to the fluid.

Seromas are different from hematomas which contain red blood and from abscesses which contain pus and result from an infection.

Seromas can sometimes be caused by a new type of partial-breast radiation therapy, as explained in a recent article in the International Journal of Radiation Oncology, Biology, Physics.[1]