Stomach, Forestomach - Edema

Stomach, Forestomach - Edema in a male F344/N rat from a chronic study. Edema fluid of low protein content results in clear spaces in the tissues (arrow).
Figure 1 of 2
comment:
Edema fluid is often lost at processing and appears as clear spaces in tissues ( Figure 1

recommendation:
When edema is seen in the absence of other lesions, it should be recorded and graded. However, edema is typically a component of another process, such as acute inflammation, so it is not typically recorded separately. If it is a significant component of the lesion, it may be recorded in addition to the primary lesion.references:
Mosier DA. 2007. Vascular disorders and thrombosis. In: Pathologic Basis of Veterinary Disease (McGavin MD, Zachary JF, ed). Mosby, St Louis, MO, 63-99.
Web page last updated on: November 24, 2014