Fig. 1From: Compositional and structural analysis of engineered stones and inorganic particles in silicotic nodules of exposed workersPhotographic image (a) and optical (b) and SEM (c) micrographs of sample S7, indicating an area surrounding a silicotic nodule close to the visceral pleura. In the SEM image, regions A to D are indicated. Histological overview of sample S3 showing the optical micrograph of a biopsy containing a well-defined nodule composed of histiocytic cells and fibroblasts, with indication of positions defined from A to D in the present study (d)Back to article page