88.Salivary Glands Flashcards Preview

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Flashcards in 88.Salivary Glands Deck (30):
1

Important anatomy near parotid gland

facial nervemaxillary and temporal arteriesinternal maxillary vein regions surrounding the external acoustic meatus and the stylomastoid foramenmandibular salivary gland

2

What is the blood supply to the parotid gland

parotid artery, a branch of the external carotid artery

3

what two of the main 4 salivary glands exit into the oral vestibule

zygomatic--caudal aspect of the last molarparotid--level of upper PM 4

4

minor salivary glands

buccallabiallingualtonsillarpalatinemolar (well developed in cats)

5

openings of the mandibular and sublingual salivary duct

sublingual caruncle (lateral to the lingual frenulum)the sublingual gland empties just caudal to mandibular duct

6

which salivary glands share a capsule

monostomatic sublingual and mandibular salivary glands share a common capsule just ventral to parotid salivary gland

7

what landmark is used to determine where the polystomatic portion of sublingual salivary gland is

lingual nervepolystomatic sublingual salivary glands run rostral to the lingual nerve

8

functions of saliva

--lubricate ingesta--facilitate packing bolus--thermoregulation--oral cavity cleansing--buffers (rich in HCO3 and K)--reduces bacT growth--protects surface epithelium

9

T/Fsalivary alpha amylase plays a significant role in CHO digestion in small animals

FALSEsalivary alpha amylase DOES NOT play a significant role in CHO digestion in small animals

10

mucus or serous production of which salivary glands

parotid and mandibular---serouszygomatic and sublingual ---mucinous

11

two phases of saliva production

1. acinus: absorb Na/H20 --sodium rich saliva2. intralobular duct: reabsorb Na and secrete HCO3 and Kresultant saliva in oral cavity is rich in HCO3 and K

12

innervation to salivary glands is under what control

autonomic nervous systemPARASYMPATHETIC via facial and mandibular nerves: increases saliva production

13

most common gland affected by sialadenosis

mandibular glandnoninflammatory swellingnon painfultx: GCC, Ab, +/- surgery +/- phenobarbital

14

define sialocele

collections of saliva within subcutaneous tissuesaliva filled cavities are lined by inflammatory connective tissue NOT true cystsMOST COMMON SOURCE: sublingual salivary glandmost common manifestation: cervical sialocele

15

causes of sialoceles

--iatrogenic --sialoliths--foreign bodies--trauma--neoplastic--IDIOPATHIC

16

signalment sialoceles

POODLEGerman Shepherd DogsAustralian Silky TerriersDachshundsno sex predisposition

17

clinical signs associated with the location of sialoceles

1. exophthalmos ---zygomatic2. labored breathing--pharyngeal 3. dysphagia--sublingual (ranula)

18

diagnostics for salivary disease

FNA (cytology, culture)radiographs +/- contrast (sialography)USCT/MRIbiopsy

19

cytology of sialocele

viscous, clear, or blood tinged fluid non-degenerative cellshomogenous pink to violet staining mucus (periodic acid shift stain)macrophages may contain foamy cytoplasm

20

treatment for pharyngeal sialocele

can cause labored breathing and/or airway obstructionaspirate or preferably LANCEmarsupializeremove mandibular and sublingual salivary glands

21

treatment for ranula (sublingual sialocele)

marsupializeremove mandibular and sublingual salivary glands (especially rostral!)

22

cervical sialocele

fluctuant, nonpainful, may change in sizeremove mandibular and sublingual salivary glands on the affected side

23

main differential for cervical sialocele

--neoplasia--abscess--granuloma--branchial cleft cysts** (HISTOPATH has a true secretory epithelial lining)

24

recurrence of cervical sialocele with removal of sublingual and mandibular salivary glands

<5%

25

complications of cervical sialocele following surgery

--seroma (placing a drain does not seem to decr risk)--infection--recurrence (<5%)--sublingual swelling--bleeding

26

sialoliths

raremost often affect parotid duct but can affect othersmay be proteinaceous material and NOT a true stone

27

surgical options for sialolith tx

--gland and duct removal--duct ligation--duct R&A--marsupialization of the dilated duct into the oral cavity--incision over stone for removal with primary duct repair

28

salivary gland neoplasia

mostly epithelial origin tumors--adenocarcinoma--acinic carcinomamostly affect mandibular and parotid salivary glandstherapy aimed at initial cytoreductive surgery following by adjuvant therapy +/- sentinel LN removal

29

dissection of the rostral portion of the sublingual salivary gland continues until what anatomic structure is seens

lingual nerve(may or may not go dorsal to digastricus muscle---especially if ranula is present and need to get more rostral tissue)

30

anatomic structure to avoid when removing the parotid salivary gland

FACIAL NERVE near external horizontal ear canal

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