D80-D89: Certain disorders involving the immune mechanism

D86: Sarcoidosis

Sarcoidosis is a group of diseases characterized by the growth of tiny collections of inflammatory cells, or granulomas, in different parts of your body—most commonly the lungs, lymph nodes, eyes and skin. The exact cause of sarcoidosis is unknown, but it may be due to an abnormal immune response. It's not contagious, so it can't be passed from person to person. Common symptoms can include persistent dry cough, fatigue, weight loss, and tender reddish bumps or patches on the skin. Additionally, some people may experience eye discomfort, shortness of breath, or swollen lymph nodes. The course of sarcoidosis varies greatly—some people may have mild symptoms that gradually improve, while others may experience serious long-term health problems, especially when multiple organ systems are involved.