(pronounced SAR-COY-DOE-SIS) is an inflammatory disease that can affect almost any
organ in the body. It causes heightened immunity, which means that a person's immune
system, which normally protects the body from infection and disease, overreacts,
resulting in damage to the body's own tissues. The classic feature of sarcoidosis is the
formation of granulomas, microscopic clumps of inflammatory cells that group together
(and look like granules, hence the name). When too many of these clumps form in
an organ they can interfere with how that organ functions.