pseudocyst pseu·do·cyst (sōō'dō-sĭst')
An abnormal sac that resembles a cyst but has no membranous lining. Also called adventitious cyst, false cyst.
A cyst whose wall is formed by a host cell and not by a parasite.
A cyst consisting of a host cell enclosing a mass of Toxoplasma parasites, usually found in the brain.