Sarcoidosis is a disease which presents important clinical differences according to its geographical distribution. Thus, the objective of this study was to evaluate the epidemiologic, clinical, radiologic, and diagnostic characteristics in a series of 30 sarcoidosis patients in the province of Salamanca (representing the Castilla-Leon region). The most relevant results are the following: a) in our region, sarcoidosis predominates in females and furthermore, the presenting age in females is greater than in males; b) there is a clear predominance of the disease in the rural area; c) the prevalence of smoking habit in these patients is low (10%); d) the clinical manifestations are similar to other Spanish series with the exception, however of a high incidence of hypercalciuria; e) there is no correlation between the increase in sedimentation rate and the degree of sarcoidosis activity; f) there is a predominance of the radiologic type 11 of the disease and there is a high number of atypic radiologic patterns. The results obtained are with regard to the pathogeny are discussed as well as the differences and similarities of this series with other preceding from other regions.