ANA positivity and complement level in pleural fluid are potential diagnostic markers in discriminating lupus pleuritis from pleural effusion of other aetiologies.
Der-Yuan ChenYen-Hsiang HuangYi-Ming ChenJeremy J W ChenTsung-Ying YangGee-Chen ChangKuo-Tung TangPublished in: Lupus science & medicine (2022)
In conclusion, ANA, C3 and C4 in pleural fluid are useful in discriminating lupus pleuritis from pleural effusion due to other aetiologies with high NPV.