Pulmonary sarcoidosis is a lung disease characterized by granulomas -- tiny clumps of immune cells that form in response to inflammation. It's the most inflammatory of the interstitial lung diseases ...

Immune molecules called cytokines play important roles in the body's defense against infection, helping to control ...

Photophobia describes a sensitivity to light, not a true phobia. It can cause eye pain and even migraines. Learn what helps ...