类肉瘤病是一种慢性多系统性肉芽肿病，好发于肺和上呼吸道，尚可发生在全身其他脏器。类肉瘤病的临床表现多种多样，症状包括盗汗、气短、咯血、体重减轻和发热等。体征包括不明原因的双肺门淋巴结病、肺内浸润、皮疹、粘膜损害等。据统计，系统性类肉瘤病的发病率为6～10：10 Sarcoidosis is a chronic, multisystem granulomatous disease that occurs in the lungs and the upper respiratory tract and can occur in other organs throughout the body. The clinical manifestations of sarcoidosis are diverse and include symptoms such as night sweats, shortness of breath, hemoptysis, weight loss and fever. Signs include unexplained hilar lymphadenopathy, pulmonary infiltrates, skin rashes, mucosal lesions and the like. According to statistics, the incidence of systemic sarcoidosis is 6 to 10: 10