Imaging Study of Pseudotumoral Chronic Sialadenitis with Cystic-Like Pattern in a Sjögren Syndrome Patient

Ultrasonography has become a valuable tool for the assessment of salivary gland involvement in Sjogren syndrome. Diagnostic pitfalls can be encountered in late stages of the disease, in which morphologic changes may overlap with other pathologies of the salivary glands. We present the case of a female Sjogren syndrome patient with lack of significant sicca symptoms and unilateral occurrence of parotidomegaly, which prompted the suspicion of a parotid gland tumor. Due to the atypical clinical profile, diagnosis of Sjogren syndrome was delayed, at which point, severe sialadenitis produced a cystic transformation of the parotid gland parenchyma.