[Ultrasound diagnostics in Sjögren's syndrome]

Sjögren's syndrome diagnosis lacks a single definitive test. Traditional imaging methods like sialography and scintigraphy are rarely used due to their complexity and cost. Ultrasound has emerged as a promising alternative. Prior research has shown that salivary gland imaging can detect structural changes linked to the disease. However, no prior work had resolved the optimal technique for routine use. This gap motivated the need for a standardized approach. The availability of high-frequency ultrasound probes in rheumatology clinics supports this shift. The method's non-invasive nature makes it appealing for repeated assessments. The focus remains on identifying key sonographic features that distinguish healthy from diseased glands.

This review aimed to evaluate the role of ultrasound in diagnosing salivary gland pathology in Sjögren's syndrome. The goal was to establish a clear protocol for imaging the parotid and submandibular glands. The authors sought to clarify the technical requirements for accurate imaging. They wanted to define the sonographic features that indicate disease activity. The study also aimed to compare ultrasound with other imaging techniques. The motivation was to replace outdated methods with a more accessible option. The focus was on sensitivity and specificity of the technique. The ultimate purpose was to guide clinicians in interpreting ultrasound findings.

The review approach centered on published literature on salivary gland ultrasound. The authors analyzed studies that compared ultrasound with other diagnostic tools. They evaluated the technical parameters of the imaging process. The analysis included probe frequency, imaging planes, and gland dimensions. The review considered the sonographic appearance of healthy and diseased glands. They assessed the role of Doppler imaging in the diagnostic process. The synthesis of findings was based on consensus from multiple studies. The review excluded outdated techniques like sialography and scintigraphy.

The review found that ultrasound has a sensitivity of 60 to 90% for diagnosing Sjögren's syndrome. The specificity of the technique was reported to be over 90%. Normal glands appear uniformly hyperechoic and homogeneous. Diseased glands show hypoechoic or anechoic foci. Submandibular atrophy is defined as a sagittal diameter under 8 mm. Parotid enlargement occurs when the diameter exceeds 20 mm. Doppler imaging did not improve diagnostic accuracy. The technique is non-invasive and suitable for repeated use.

The authors concluded that ultrasound is a reliable method for assessing salivary gland involvement. They emphasized the importance of using high-frequency probes for detailed imaging. The review supports the use of ultrasound over other outdated techniques. The findings suggest that sonography should be a routine part of the diagnostic process. The technique's high specificity makes it a valuable tool for rheumatologists. The review does not claim that ultrasound is the only diagnostic method. The authors propose that it complements other clinical and laboratory findings. They suggest further studies to refine imaging protocols.