Occult primary Sjögren Syndrome in patients with interstitial pneumonia with autoimmune features.

Introduction/objectives: To define the performance of Minor Salivary Gland Biopsy (MSGB) and Dry Eye Tests (DET) to detect occult Sjögren Syndrome (SS) among Interstitial Pneumonia with Autoimmune Features (IPAF) patients.

Methods: Prospective study. Interstitial Lung Disease (ILD) patients without defined Connective Tissue Disease and one or more IPAF classification domains or xerophthalmia were included.