Anti-Ro/SS-A antibody-positive interstitial pneumonitis in a non-lupus patient.

We describe a 42-year-old anti-Ro/SS-A antibody positive non-lupus patient who developed interstitial pneumonitis in combination with several common clinical features with previously reported lupus pneumonitis patients whose anti-Ro/SS-A antibodies were positive, while whose antinuclear antibodies were negative. We consider that these patients may belong to a same new clinical entity. A variety of characteristic manifestations related to anti-Ro/SS-A antibodies has been reported in patients with systemic lupus erythematosus (SLE) and other connective tissue diseases [1] [2], and an association between these antibodies with pulmonary parenchymal involvement has been reported by Hedgpeth and Boulware in patients with SLE [3] [4]. We report here a 42-year-old non-lupus male patient with pulmonary fibrosis who presented with anti-Ro/SS-A antibodies.