What is the agreement between pathological features of parotid gland and labial salivary gland biopsies?

We read with a great interest the recent contribution by Mossel et al ,1 which brings new important data on the diagnostic value of major salivary ultrasonography (SGUS) for primary Sjogren’s syndrome (pSS), as reported in previous studies2–10 and stresses the need to evaluate the inclusion of SGUS into future classification criteria for the disease. In their cohort of 103 consecutive patients clinically suspected for pSS, Mossel et al reported a good agreement between SGUS and labial and parotid salivary gland biopsy. Agreement was reported to be marginally higher for parotid gland biopsy (absolute agreement of 83%) than for minor labial salivary gland biopsy (absolute agreement 79%). However, the …