A Rare Cause of Pleural Effusion: Ankylosing Spondylitis

Ankylosing spondylitis (AS) is a seronegative spondyloarthropathy involving the axial skeleton and major joints. Pleuropulmonary involvement is rare manifestation of AS mostly presented as apical fibrobullous disease and pleural thickening. Herein, we report a rare case with right sided pleural effusion in a male patient that was determined on a chest x-ray performed routinely before initiation of anti-TNF therapy. Pleural effusion was a...