PT  - JOURNAL ARTICLE
AU  - Esther Mossel
AU  - Konstantina Delli
AU  - Jolien F van Nimwegen
AU  - Alja J Stel
AU  - Frans G M Kroese
AU  - Fred K L Spijkervet
AU  - Arjan Vissink
AU  - Suzanne Arends
AU  - Hendrika Bootsma
ED  - ,
TI  - Ultrasonography of major salivary glands compared with parotid and labial gland biopsy and classification criteria in patients with clinically suspected primary Sjögren’s syndrome
AID  - 10.1136/annrheumdis-2017-211250
DP  - 2017 Nov 01
TA  - Annals of the Rheumatic Diseases
PG  - 1883--1889
VI  - 76
IP  - 11
4099  - http://ard.bmj.com/content/76/11/1883.short
4100  - http://ard.bmj.com/content/76/11/1883.full
SO  - Ann Rheum Dis2017 Nov 01; 76
AB  - Objective To assess the validity of ultrasound of major salivary glands (sUS) compared with parotid and labial gland biopsies, sialometry, anti-SSA/Ro antibody status and classification criteria in patients clinically suspected with primary Sjögren’s syndrome (pSS).Methods 103 consecutive outpatients with clinically suspected pSS underwent sUS. Parenchymal echogenicity, homogeneity, hypoechogenic areas, hyperechogenic reflections and clearness of salivary gland border were scored according to the Hocevar scoring system. Total ultrasound score was calculated as the sum of these domains (range 0–48).Results Absolute agreement between sUS and parotid (83%) and labial (79%) gland biopsy outcome was good. Negative sUS predicts negative parotid gland biopsy, and positive sUS predicts positive labial gland biopsy. Compared with the American European Consensus Group (AECG) classification, sUS showed an absolute agreement of 82%, sensitivity of 71% and specificity of 92%. Compared with the American College of Rheumatology (ACR) classification, absolute agreement was 86%, sensitivity was 77% and specificity was 92%. Compared with the ACR-European League Against Rheumatism (EULAR) classification, absolute agreement was 80%, sensitivity was 67% and specificity was 94%. Positive sUS predicts classification, but negative sUS does not exclude classification. The combination of positive sUS with presence of anti-SSA/Ro antibodies or negative sUS with absence of anti-SSA/Ro antibodies showed a high predictive value for classification as pSS or non-pSS.Conclusion In our prospective inception cohort study derived from daily clinical practice, absolute agreement between sUS and salivary gland biopsies was slightly higher for parotid compared with labial gland biopsies. The combination of positive sUS and presence of anti-SSA/Ro antibodies highly predicts classification according to the AECG, ACR and ACR-EULAR classification criteria.