Canine Salivary Mucocele Study Guide

Overview and Clinical Importance

Salivary mucocele (also known as sialocele) is the most common salivary gland disorder in dogs, accounting for approximately 0.3% of veterinary diagnostic submissions. It is defined as an accumulation of saliva that has leaked from a damaged salivary gland or salivary duct and collected in the surrounding subcutaneous or submucosal tissues. Unlike true cysts, mucoceles are lined by inflammatory granulation tissue rather than epithelium, making them technically pseudocysts.

This condition is almost exclusively seen in dogs and very rarely affects cats. Understanding salivary mucocele is essential for the NAVLE because it requires integration of anatomy, pathophysiology, diagnostic reasoning, and surgical treatment principles.

Anatomy of the Major Salivary Glands

Dogs have four pairs of major salivary glands. Understanding their anatomy is critical for determining which gland is affected and planning surgical intervention.