Serous Or Edematous Infiltration is a condition of dropsy of the cells. All kinds of cells may be involved, but it is most common in the epithelial. It is an absorption of an excess of plasma by the cells.

It may accompany general dropsy or result from inflammation; is also found in tumors.

The part involved is usually enlarged, spongy, and edematous.

The cells are distended and filled with large and small vacuoles in the protoplasm and at times within the nucleus.