There are four kinds of products:powered,granular,nubbly and over-slender,which are widely used in the field of rubber,pesticide,paint,fodder,vinylite,adhesive and so on.
Histopathologic examination showed hyperkeratosis of epidermis, increased thickness of the granular layer and dilation of subpapillary vessels filled with red blood cells.
The automorphic, hypidiomorphic and xenomorphic granular textures are the main ore textures and vein and disseminated structures are the main ore structure.
We selected 30 patients with MA randomly then analyzed the changes of peripheral blood maps and stainable iron in morbid granular cells and macrophages of these patients.