Seasonal Clustering of Sarcoidosis in Spring in Turkey

Sarcoidosis is a systemic granulomatous disease that primarily affects the lung and lymphatic systems of the body. Some studies have observed a seasonal clustering of sarcoidosis cases in winter and early spring (1). Seasonal clustering of sarcoidosis was reported in some surveys from both southern and northern hemisphere of the world. The peak of disease onset is March-May in London, March-April in Athen, January-June in northern Finland, April-June in Barcelona, April-August in Japan and August-December in New Zealand (2-6). We aimed to reveal that if there was a seasonal clustering of sarcoidosis in west part of Turkey. In the following, we detect a relation between the season and clinical, laboratory and radiological findings of patients. Seasonal Clustering of Sarcoidosis in Spring in Turkey