key points to learn SGs Flashcards

1
Q

SG tumours by incidence

A
pleomorphic adenoma
Warthin's tumour
adenoid cystic carcinoma
mucoepidermoid carcinoma
acinic cell carcinoma
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2
Q

pleomorphic adenoma location

A

PAROTID
(SM)
(minor - palate)

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3
Q

pleomorphic adenoma clinical

A

unilateral
painless
slow-growing
not fixed to underlying tissues

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4
Q

pleomorphic adenoma histology

A

epithelial: ducts/cystic
myoepithelial cells
stroma: myxomatous - CT
fibrous tissue capsule - often incomplete

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5
Q

pleomorphic adenoma tx and recurrence

A

surgery
recurrence - incomplete capsule
risk of malignant transformation 3-13%

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6
Q

Warthin’s tumour location

A

PAROTID

(SM)

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7
Q

Warthin’s tumour clinical

A

smoking
can be bilateral and multifocal
painless
slow-growing

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8
Q

Warthin’s tumour histology

A

well-defined CT capsule
epithelial tissue, cystic formations
dense lymphoid tissue stroma
- germinal centres

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9
Q

Warthin’s tumour - where is it thought to arise from?

A

remnants of salivary duct epithelium trapped in LNs during embryogenesis

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10
Q

Warthin’s tumour tx and recurrence

A

surgery (/monitor)
low recurrence rate
1% malignant transformation of epithelial component

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11
Q

Adenoid cystic carcinoma location

A

most common minor malignancy - palate

can get major

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12
Q

Adenoid cystic carcinoma clinical

A
asymptomatic
can get ulcer
perineural invasion - neuropathies - parotid facial n palsy
slow growing
invasive
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13
Q

Adenoid cystic carcinoma histology

A
cribiform
tubular
solid
swiss cheese
no capsule
perineural invasion
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14
Q

Adenoid cystic carcinoma tx and recurrence

A

surgery and radio
poor prognosis - local recurrence - hard to determine clinically how far tumour has spread
haematogenous spread to lungs most common

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15
Q

mucoepidermoid carcinoma location

A

50% parotid

minor - palate

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16
Q

mucoepidermoid carcinoma clinical

A
swelling
pain
ulcer
infiltration
discolouration
facial paralysis
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17
Q

mucoepidermoid carcinoma histology

A

mucin secreting cells
intermediate cells
epidermoid cells
perineural spread

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18
Q

mucoepidermoid carcinoma tx

A

surgery and radio

high grade poorer survival

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19
Q

acinic cell carcinoma location

A

parotid >80%

can be bilateral

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20
Q

acinic cell carcinoma clinical

A

slowly enlarging
few symptoms
occ involves nerves / regional nodes
invasive

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21
Q

acinic cell carcinoma histology

A

serous acinar cell differentiation
clear/vacuolated cells
intercalated duct like cells
non-specific glandular cells

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22
Q

acinic cell carcinoma tx

A

slow growth, good prognosis

surgery

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23
Q

sialectasis

A

cystic dilatation of duct

24
Q

extrasalivary manifestations of mumps

A

oophoritis
orchitis
pancreatitis

25
mumps clinical
bilateral enlargement parotid pain skin over unaffected malaise, fever, headache
26
mumps histology
accumulation of neutrophils and fluid in lumen of ductal structures
27
acute bacterial sialadenitis clinical
``` one gland pus discharge redness of overlying skin trismus pyrexia ```
28
acute bacterial sialadenitis histology
acinar destruction with neutrophil infiltrates and bacterial presence
29
acute bacterial sialadenitis underlying cause
``` ALWAYS dehydration and flow reduction flow obstruction DM immune suppression abnormal anatomy hospital pts SS elderly HandN radio ```
30
mucocele recurrence
esp if traumatic habit persists | RFs = younger pt, ventral tongue
31
mucocele histology
``` vascular GT surrounding a mucus pool foam cells macrophage lined cavity cystic cavity severed duct if trauma ```
32
sialolithiasis clinical
``` unilateral SG swelling worst pain periprandial painful intermittent affected gland can get infected - suppurative sialadenitis ```
33
sialolithiasis histology
calcified structure dilated ducts with calculi chronic inflammatory cells metaplasia of lining from columnar to SSE - irritation from stone
34
sialolithiasis diagnosis
``` hx attempt to palpate calculus radiograph - not always sialography CT - check for other causes of obstruction ```
35
sialolithiasis tx
``` conservative - moist heat and gentle massage - hydration - sialogogues e.g. lemon drops - try to remove it if in proximity of exit - NSAIDs - AB if infection surgery lithotripsy sialendoscopy surgical removal of gland - recurrent stones/irreversible damage to gland ```
36
sialosis
non-inflammatory, non-neoplastic, chronic, diffuse enlargement of major SGs painless bilateral can be reactive mechanism e.g. EDs/alcoholism clinical diagnosis no tx
37
sialosis histology
hypertrophy of serous acini | oedema of interstitial CT
38
causes of xerostomia
``` dehydration psychological mouth breathing neurological dysfct disease e.g. SS, sarcoidosis meds - tricyclics, antihistamines, diuretics SG tumour SG trauma nutritional deficiencies and/or EDs ```
39
pilocarpine dose
5mg up to 30mg
40
pilocarpine contraindications
``` iritis and narrow angle glaucoma CV disease chronic pulmonary disease inc uncontrolled asthma pts taking B adrenergic blockers active gastric ulcers ```
41
pilocarpine SEs
``` vision changes hiccups bradycardia hypotension bronchoconstriction hyperhidrosis nausea, vomiting, diarrhoea cutaneous vasodilation increased urinary freq ```
42
frey's syndrome
gustatory sweating | excision from parotid gland and damaged nerve fibres
43
indication of malignant change
rapid growth pain fixation to deep tissues facial palsy
44
acute necrotising sialometaplasia process
vascular damage of palatine vessels | ischaemic necrosis and infarction of minor SGs
45
acute necrotising sialometaplasia histology
hyperplasia metaplasia of ducts necrosis of salivary acini
46
sarcoidosis
collections of granulomas | can occur in any organ but often affect SGs causing large masses and facial palsy
47
duct atresia
failure of a duct to canalise | can result in salivary retention cysts
48
HIV
parotid enlargement in 10% pts
49
CF
causes plugging of acinar ducts with precipitated secretions | essentially microscopic sialoliths
50
gland infiltration - amyloidosis
build up of amyloid protein fibrils | lymphoepithelial cysts
51
aplasia
congenital absence of 1 or more SGs | ectodermal dysplasia
52
why are SG tissues sensitive to radio?
because of their highly differentiated and specialised state | - not because of high mitotic figures
53
SG and chemo
reduced secretion | early apoptosis of SG cells
54
radioiodine
reduction of gland fct | increased lymphocytic infiltrate
55
SS investigations
``` 1 - dry eyes subjective 2 - dry eyes objective 3 - dry mouth subjective 4 - dry mouth objective 5 - autoAB findings 6 - HP American european consensus group revised international criteria 4 or more positive criteria (must inc 5 and/or 6) ```
56
SS minor gland histology
``` focal lymphocytic sialadenitis - focal collections of 50+ lymphocytes - ≥1 collection/4mm2 acinar loss fibrosis ```
57
SS major gland histology
lymphocytic infiltration atrophy of acini ductal epithelium shows hyperplasia which eventually occludes ducts - myoepithelial islands