| pseudocyst |
1. an abnormal or dilated cavity resembling a true cyst but not lined with epithelium. Called also adventitious or false cyst. 2. a cystic collection of fluid and necrotic debris whose walls are formed by the pancreas and other surrounding organs. It occurs as a complication of acute pancreatitis, and may subside spontaneously or become secondarily infected and develop into an abscess. Cf. pancreatic phlegmon, under phlegmon. 3. a cluster of small, comma-shaped forms of Toxoplasma gondii (bradyzoites), perhaps containing thousands of organisms, enclosed by an irregular wall, and representing a resting stage, as opposed to the active, motile stage (tachyzoite); pseudocysts are found in the tissues, especially muscles and the brain, in chronic (latent) toxoplasmosis. Called also tissue cyst.
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