"Pleural effusion is a bodily fluid that is produced in exess and accumulates in the pleural cavity, the fluid-filled space that surrounds the lungs. Excessive amounts of such fluid can impair breathing by limiting the expansion of the lungs during inhalation."^^ . "Wikipedia:Pleural_effusion"^^ . "ENVO:02000033"^^ . "pleural effusion"^^ . . "ENVO"^^ . .