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(Chest. 1973;64:193-196.)
© 1973 American College of Chest Physicians

A Current Hypothesis of the Lymphatic Transport of Inspired Dust to the Parietal Pleura

Eero Taskinen M.D.1; Kaj Ahlman M.D.1; and Matti Wiikeri M.D.1

1 Institute of Occupational Health, Helsinki; Department of Pathology, University of Helsinki, Finland

In the light of a case report, we will describe a hypothesis of the lymphatic transport mechanism of inhaled dust particles to the parietal pleura. The autopsy of a molder who had been employed for 41 years in iron foundries showed heavy mixed-dust pneumoconiosis. In the parietal pleura there were black linear streaks following the course of intercostal arteries. These formations were microscopically interpreted as periarterial lymphmgitis and fibrosis caused by the dust. According to our hypothesis, the dost particles have been transported from the lungs via the lymphatic vessels partly in retrogression. The mechanism is supposed to be the same in the transport of small asbestos particles causing pleural plaques.

Submitted on November 16, 1972
Accepted on March 5, 1973




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