The Lump Under a Dog's Jaw: What a Salivary Mucocele Is
A soft, fluctuant swelling under a dog's jaw or along the upper neck, sometimes appearing gradually over days, is often a salivary mucocele, a build up of saliva under the skin after a salivary gland
A soft, fluctuant swelling under a dog's jaw or along the upper neck, sometimes appearing gradually over days, is often a salivary mucocele, a build up of saliva under the skin after a salivary gland or duct is damaged.
What actually happens
Saliva glands sit near the jaw and neck, connected to the mouth by small ducts. If a duct is damaged, whether from trauma, a bite wound, or simply an unknown cause, saliva leaks into the surrounding tissue instead of reaching the mouth, forming a soft, painless pocket of fluid under the skin.
What it looks and feels like
A soft, fluid filled swelling, usually under the jaw, along the upper neck, or occasionally under the tongue
Generally not painful to the touch, unlike an abscess
Slow growing, sometimes reaching a noticeable size before an owner takes action
The dog may show no other symptoms at all in early stages
Diagnosis
A vet typically confirms a mucocele through a fine needle aspiration, drawing out a stringy, slightly blood tinged fluid that looks distinctly different from pus or typical cyst fluid. This alone usually distinguishes it from an abscess or a tumour, though imaging may be used to identify the affected gland precisely.
Treatment
Draining the mucocele alone tends to bring only temporary relief, since the leaking gland continues to produce saliva. The definitive treatment is surgical removal of the affected salivary gland and its duct, after which recurrence is uncommon. Left untreated, particularly a mucocele under the tongue, it can occasionally interfere with eating or breathing, so treatment is generally recommended rather than simply monitored indefinitely.
Common Questions
Q: Can a salivary mucocele come back after surgery? A: Recurrence is uncommon once the correct affected gland and duct are fully removed.
Q: Is the surgery for a salivary mucocele risky? A: It is a fairly standard procedure with generally low risk in the hands of an experienced vet.
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