FBLN-3 as a biomarker of pleural plaques in workers occupationally exposed to carcinogenic fibers: a pilot study.

FBLN-3 has recently been proposed as a biomarker for malignant mesothelioma. A significantly increased standardized mortality rate from malignant mesothelioma has been reported in Biancavilla, Italy. Its cause has been identified in environmental exposure to fluoro-edenite. The aim of this study was to seek a correlation between plasma FBLN-3 concentration and pleural plaques in subjects exposed to fluoro-edenite and in a nonexposed control group. Pleural plaques was never detected in the control group, whereas it was found in 52% of exposed subjects. Median FBLN-3 concentrations were 12.96 and 5.29 ng/ml in the exposed and the control group, respectively (p < 0.001). FBLN-3 plasma levels exhibited a high predictive value for the presence of pleural plaques.