seroma

A seroma is a pocket of clear serous fluid that sometimes develops in the body after surgery. This fluid is composed of blood plasma that has seeped out of ruptured small blood vessels and the inflammatory fluid produced by injured and dying cells.

Seromas are different from hematomas, which contain red blood cells, and abscesses, which contain pus and result from an infection. Serous fluid is also different from lymph.

Early or improper removal of sutures can sometimes lead to formation of seroma ...