Canis ISSN: 2398-2942

Salivary mucocele

Synonym(s): Ranula, Salivary cyst, Sialocele

Contributor(s): Rosa Ragni

Introduction

  • Cause: collections of saliva in tissue outside secreting gland or its ducts.
  • Signs: acute - firm and painful swelling; chronic - unilateral fluctuant non painful swelling; may become firm and painful (if infected).
  • Diagnosis: clinical signs, aspiration, surgical exploration.
  • Treatment: affected salivary gland resection, marsupialization for intraoral mucoceles.
  • Prognosis: may recur, good if entire gland and duct system removed.

Pathogenesis

Etiology

  • Unknown: various theories have been proposed:

Predisposing factors

General
  • Developmental predisposition.
  • Facial/oral surgery.

Pathophysiology

  • Trauma/bites/neoplasia/idiopathic/iatrogenic → leakage of saliva into surrounding tissue.

Sublingual - acute
  • Firm and painful swelling.

Sublingual - chronic

  • Unilateral fluctuant non painful swelling; may become firm and painful (if infected). Cervical swellings may sink over time, migrating towards the midline Salivary gland: mucocele.

Sublingual ranula

  • Less commonly, may develop sublingually as a ranula Salivary gland: ranula.
  • May cause interference with tongue function.
  • May provoke salivation.

Parotid mucocele

  • Discrete swelling over the masseteric region Salivary gland: parotid sialocele.

Zygomatic mucocele

  • Causes exophthalmos and/or divergent strabismus.

Timecourse

  • Days to weeks.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Poirier V J, Stankeova S, Kaser-Hotz B (2008) Efficacy of radiation therapy for the treatment of canine sialocoele. Vet Radiol Ultrasound 49, 108.
  • Spangler W L & Culbertson M R (1991) Salivary gland disease in dogs and cats - 245 cases (1985-1988). JAVMA 198 (3), 465-9 PubMed.
  • Smith M (1985) Surgery of the canine salivary system. Comp Cont Educ Pract Vet 7 (6), 457-465 VetMedResource.
  • Schmidt G M & Betts C W (1978) Zygomatic salivary mucocoeles in the dog. JAVMA 172 (8), 940-2 PubMed.

Other sources of information

  • Dunning D (2003)Oral cavity: tongue, lips, cheeks, pharynx, and salivary glands.In:Textbook of Small Animal Surgery.3rd edn. Slatter D (ed), W B Saunders, Philadelphia, pp 553-561.
  • Hedlund C S (2002)Surgery of the oral cavity and oropharynx.In:Small Animal Surgery. 2nd edn, T W Fossum (ed), Mosby, St. Louis, pp 274-307.
  • Knecht C D (1998)Salivary glands.In:Current techniques in Small Animal Surgery.4th edn, Bojrab M J (ed), Williams and Wilkins, Baltimore, pp 183-186.


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