ULTRASONOGRAPHIC SALIVARY GLAND RESPONSE TO RITUXIMAB IN SECONDARY SJÖ GREN’S SYNDROME

Abstract

B cell hyper-reactivity implied in the pathogenesis of Sjö gren’s syndrome (SS) justifies the therapy that involves B cell depletion. Ultrasound of salivary glands demonstrated alterations during disease progression. Objective. To evaluate changes in salivary gland parenchyma with ultrasound after rituximab treatment in patients’ with secondary SS (sSS). Methods. 7 patients evaluated at baseline (under treatment with rituximab) and after 6 months, underwent ultrasonography of major salivary gland (submandibular and parotid). Clinical data as dryness, pain and diseases activity evaluated with ESSDAI were registered. Salivary gland ultrasound (SGUS) was performed to asses echogenity (using a semiquantitative score from 0-4, with improvement defined as an at least 1 point decrease), size of gland and glandular borders. Results. Of 7 patients, 14% had clinically detectable bilateral parotid tumefaction at baseline. 6 patients (85.71%) showed ultrasonographic alterations at baseline. Parotid parenchyma echostructure improved in 42.85% of patients versus 14.28% in control group (p=0.05). At the submandibular glands, both submandibular glands showed changes in 28.57% of patients, while control group showed no changes. 42.85% patients showed parotid tumefaction which changed in 66.6% of patients at 6 months. Conclusion. Ultrasonography showed improvement in salivary gland echostructure in secondary Sjogren Syndrome with rituximab.

Keywords

• ultrasonography
• salivary glands
• secondary sjö gren’s syndrome