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[Preliminary report concerning the histologica patterns of an anthracotic pneumoconiosis observed in the area of Londrina, Brasil (author's transl)].

The A. presents a preliminary report concerning on the histologic patterns of an anthracotic pneumoconiosis found in necropsies of the "Hospital Universitário da Universidade de Londrina", Paraná, Brazil, and in some cases from the Legal Institute of the same town. The lesions, on its histologic pattern are comparable to those observed in the lung of coal and iron mines workers as described in the consulted literature. The cases studied (plantations workers and dwellers at rural and suburban areas) are proceeding from an essencially agricultural region, without detectable polluition by industry or others known factors. This agricultural zone presents some geophysic peculiarities and dust from the errosive soil, is a constant factor in the local athmosphere. The soil is so called "Terra Roxa" (red soil) and in its physicochemical composition there is a great amount of iron oxides, silica (silt, agril laceous material), aluminium, manganese, organic compounds. In this preliminary report the A. suggests further research for a better knowledge of the composition of the respirable air and if dust exposures are or not responsible for the lung lesions.