Eosinophilic Sialodochitis Mimicking Sjögren's Syndrome.

Eosinophilic sialodochitis (ES) is a rare allergic condition affecting the major salivary glands. It may present to rheumatologists by mimicking Sjögren's syndrome. ES typically presents with recurrent swelling of the major salivary glands and oral dryness due to low-quality, low-volume saliva production. Although the condition is not completely understood, the most accepted aetiology of ES is an allergic process, which is characterised by eosinophilic predominant infiltration of salivary gland tissue, eosinophilic-rich mucous plugs and peripheral eosinophilia. We present a rare case of ES mimicking Sjögren's syndrome.