Paediatric Sjögren's Syndrome With Bilateral Parotid Cysts: A Case Report.

Sjögren's syndrome is an autoimmune disease characterized by the destruction of exocrine glands. Clinically, this results in the loss of tear and saliva production. Although xerophthalmia and xerostomia, also known as sicca, is a common presentation among adults, paediatric patients more often present with recurrent parotitis and glandular enlargement. Overall, symptoms can vary, making initial diagnosis challenging. Approximately 80% of patients with Sjögren's syndrome experience parotid gland enlargement, however, salivary cysts are rare. Herein, we present a case of paediatric Sjögren's syndrome where a 12-year-old female presented with a two-month history of bilateral parotid masses. The patient denied any history of xerostomia, xerophthalmia, or constitutional symptoms. Imaging revealed bilateral complex cystic intraparotid masses. A right parotid gland biopsy was performed showing parotid gland parenchyma with dense lymphoplasmacytic infiltrate. Ultimately, the presumptive diagnosis of Sjögren's syndrome was made. This case illustrates the importance of a thorough workup to aid in diagnostic certainty. Parotid cysts associated with Sjögren's are rare but should be considered within the differential diagnosis for paediatric patients with parotid swelling/mass.