salivary gland Flashcards
discuss use of rads in salivary gland
- Plain radiography Rarely helpful
- May confirm diagnosis of sialolith
- Contrast radiography (Sialography)
- Rarely used
- May help determine extent of salivary
involvement in cases of trauma, neoplasia,
sinus tracts, and foreign bodies
Subcutaneous (submucosal) accumulation of saliva within a non-epithelial, non- secretory lining
- salivary mucocele
- Most common disease of
the salivary system in
dogs and cats
gland Most commonly affected by mucocele
- Sublingual salivary duct
- monostomatic portion
Saliva accumulation sites for sublingual gland mucocele
-
Cervical mucocele
- Intermandibular or cervical
- accumulation
- Most common
-
Ranula
- Sublingual accumulation
-
Pharyngeal mucocele
- Pharyngeal wall accumulation
- Least common
Dog breeds overrepresented with
salivary mucocele
- German shepherd dog (Smith, 2000)
- Miniature poodle (Smith, 2000)
- Pekingese
- Dachshund
type of mucocele which results in Periorbital accumulation of saliva
Zygomatic gland mucocele
Clinical signs of salivary mucocele
- Soft, non painful swelling
- May be painful if in acute inflammatory
stage or if secondarily infected
which salivary mucocele results in respiratory distress
pharyngeal mucocele
Treatment of salivary mucocele
- Surgical removal of the involved gland
- Definitive treatment
- Drainage of accumulated saliva
- In conjunction with definitive treatment
- Conservative treatment in high-risk patients
- Aspiration of ranula or marsupialization?
- Lancing of pharyngeal mucocele
- To relieve respiratory distress
discuss how Sialoadenectomy is done
- Lateral approach:
- with the patient in lateral
recumbency,
- an incision is made over the mandibular
salivary gland
discuss sialodectomy in mandibular and sublingual glands
- Excision of mandibular and sublingual
salivary glands
- Mandibular gland too closely associated with
sublingual gland to allow
- excision of only the sublingual gland
5
Prognosis for salivary mucocele
- Excellent prognosis
- Recurrence after mandibular/sublingual gland resection
- Less than 5%
- Inadequate excision
- Failure to remove enough of the polystomatic sublingual gland
- Operation of the wrong side
Salivary duct stones
sialoliths
most commonly affected gland (dogs) by sialoliths
Parotid
obstruction of the duct leads to painful swelling
not a mucocele
dx for sialoliths
Palpation
Radiography
tx for cealoliths
Removal through oral incision over duct at site of sialolith
Sialoadenitis
Primary disease (rare) or secondary to trauma or systemic infection (viral?)
ddx for sialodenitis
Mucocele
Neoplasia
which salivary gland is mostly affected by sialodenitis
- Zygomatic salivary gland
- May lead to retrobulbar abscess
cause of the parotic fistula
thought to be caused by trauma to the parotid duct
tx for parotid fistula
Ligation of the parotid duct results in atrophy
of the gland by the 5th day
salivary gland tumors in dogs
no breed predilection
uncommon
parotid mostly
salivary gland tumors in cats
uncommon
siamese cats
mostly mandibular gland
tx for salivary tumors
radiotherapy
remember that adenocarcioma is the most common neoplasia of salivary glands
