Autopsy indicators of exposure to asbestos and lung cancer.

In many instances, only post-mortem examination can provide probative data about (i) the presence of lung cancer and (ii) its relationship to exposure to asbestos. Moreover, the results of an autopsy may suggest that a thorough investigation of occupational history should be carried out, since such information is rarely recorded in clinical records. We considered pathological indicators for selecting subjects who had a high likelihood of previous occupational exposure to asbestos. The positive predictive value of pleural plaques ranged from 20 to 75%, depending on their size and on the concentrations of asbestos bodies and uncoated mineral fibres in the lung. The probability of no exposure was greater than 90% if neither asbestos bodies nor uncoated mineral fibres were found. Another purpose of our work on lung cancer and exposure to asbestos was to investigate the relationships between exposure and the occurrence of specific cell types of lung cancer in an autopsied population. Both work history and asbestos body count were considered. The matched analysis showed some tendency towards an association between the occurrence of adenocarcinoma and the presence of indicators of exposure to asbestos.