Distribution pattern of Sjögren's syndrome: a sialographical study.

Area of Science:

• Salivary gland imaging
• Autoimmune disease diagnostics
• Radiology

Background:

• Investigating ductal lesions in Sjögren's syndrome (SS).
• Comparing primary SS (pSS) and secondary SS (sSS) ductal symmetry.
• Utilizing sialography for salivary gland assessment.

Purpose of the Study:

• To analyze horizontal and vertical symmetry of ductal lesions in major salivary glands.
• To differentiate between primary and secondary Sjögren's syndrome using sialography.
• To identify key sialographic features indicative of SS.

Main Methods:

• Controlled sialographical study involving 98 patients (38 pSS, 38 sSS, 22 controls).
• Contrast radiography of parotid and submandibular glands.
• A 6-point scoring system for calculating gland summary indexes.

Main Results:

• Sparsity of ductal branching was the most common finding.
• Horizontal symmetry was more pronounced in parotid glands in pSS and submandibular glands in sSS.
• Peripheral duct width and acinar dilatations were discriminating features; left parotid showed most advanced lesions.

Conclusions:

• Peripheral ducts are more affected than main excretory ducts in SS.
• Asymmetric involvement observed in parotid glands (pSS) and submandibular glands (sSS).
• Parotid glands generally show greater involvement than submandibular glands; left parotid sialography recommended.