Salivary Gland Pathology: Flashcards
1
Q
Parotid Gland
A
- Serous
- most likely to get a tumor
- ⅔ are benign
2
Q
Submandibular Gland
A
- Serous + Mucus
- 26-45% are malignant
- Adenoid Cystic Carcinoma: 11-17%
3
Q
Sublingual Glands
A
- Mucus
- 1% of all Salivary Gland Tumors
- 70-90% are malignant
4
Q
Minor Glands
A
- 40-50% are malignant
- smaller the gland, more likely its malignant
- Palate> Upper Lip> Buccal Mucosa
5
Q
Salivary Gland Aplasia
A
- 1+ major Salivary gland does not develop
- can occur alone or associated with:
- Mandibulofacial dysotosis
- (Treacher Collins syndrome)
- Hemifacial microsomia
- Lacrimo-auriculo-dento-digital syndrome
- Mandibulofacial dysotosis
6
Q
Salivary Gland Aplasia: Oral Manifestations
A
- Salivary Deficiency
- caries due to “dry mouth”
7
Q
Salivary Gland Aplasia: Treatment
A
- Artificial saliva or stimulating salivary flow
- Pilocarpine
- Cevimeline
8
Q
Salivary Gland Aplasia is associated with what other diseases?
A
- Mandibulofacial dystosis
- Treacher Collins Syndrome
- Hemifacial microsomia
- lacrimo-articulo-dento-digital syndrome
9
Q
Mucocele
A
- ruptured salivary duct
- mucin into soft tissue
- Lower Lip-most common
- Superficial Mucoceles:
- lichenoid reactions
10
Q
Mucocele: Clinical Appearance
A
- dome shaped swelling
- bluish translucent hue
11
Q
Mucocele: Treatment
A
- Local excision and removal of feeding gland/duct
12
Q
Ranula
A
- mucocele on the floor of the mouth
- associated with sublingual or submandibular gland
- Location:
- Duct of Rivinus or Bartholin Duct
- Plunging or Cervical Ranula:
- if it continues to grow=swelling in the neck
- goes into mylohyoid facial planes
13
Q
Ranula: Treatment
A
- Surgical excision along with feed gland/duct
14
Q
Salivary Duct Cyst
A
- aka Mucous Retention Cyst
- TRUE cyst w/epithelium lining
- Develops secondary to duct blockage
- major gland=parotide gland→Most common
- Minor Glands→ floor of mouth, buccal mucosa, lips
-
Ductal ectasia
- due to blockage and increased intraluminal pressure
- not a true cyst
15
Q
Salivary Duct Cyst: Clinical Appearance
A
- soft, fluctuant swelling w/bluish hue
16
Q
Salivary Ductal Cyst: Histo
A
- Dx: Papillary cystadenoma
- if extensive proliferation
17
Q
Sialolithiasis
A
- AKA Salivary gland stones
- calcified structures in the salivary duct system
- 80% in submandibular glands
18
Q
Sialadenitis
A
- infection of the salivary duct→ inflammation
- Viral
- Mumps (most common)
- CMV (infants)
- ECHO
- HIV
- Bacterial
- normally due to Sialoliths or decreased flow
- S. aureus and streptococci
- most common
- Non-infectious:
- Radiation
- Allergy
- Sjogren Syndrome
- Viral
19
Q
Cheilitis Glandularis
A
- Inflammation of minor salivary gland
- swollen (lower) Lips
- glands retain mucin
- 3 types:
- Simple
- Superficial suppurative
- Baelz disease
- bacterial involved
- Deep suppurative
- Cheilitis glandular apostematosa
- bacterial
20
Q
Cheilitis Glandularis; Etiology
A
- Actinic damage=UV radiation
- Tobacco
- hereditary
- Hygiene
21
Q
Cheilitis Glandular: histo
A
- concomitant dysplastic changes
- can transform into SCC
22
Q
Cheilitis Glandularis: Tx
A
- Vermillionectomy
23
Q
Polymorphous Adenocarcinoma
A
- only minor salivary glands
- PRKD1 somatic point mutation (E710D)
- Location:
- hard or soft palate-Mainly
- Bleeding or discomfort
- infiltrate bone
- “Polymorphous”
- multiple growth patterns
24
Q
Sialorrhea
A
- Excessive Salivation
- Types:
- Minor
- True Sialorrhea
- Relative sialorrhea
- idiopathic paroxysmal sialorrhea
25
Sialorrhea: Tx
* Medication
* Sever Chorda tympani-no parasympathetic stimulation
26
Minor Sialorrhea
* Local Irritation
* aphthous ulcers
* ill-fitting dentures
* Episodic hypersecretion due to GERD
27
True Sialorrhea
* Rabies
* Heavy-metal poisoning
* Antipsychotic agents:
* Clozapine
* Cholinergic agonists to treat:
* Dementia of the Alzheimer type
* Myasthenia Gravis
28
Relative Sialorrhea
* Lack of neuromuscular control
* seen in patients w/cognitive impairments
* Surgical resection of the mandible
* Cerebral Palsy
* Parkinson Disease
* ALS
* Stroke
29
Idiopathic Paroxysmal Sialorrhea
* short episodes (2-5 mins) of excess salivation
* Prodrome of nausea or epigastric pain
30
Xerostomia
* Sensation of dry mouth
* due to decreased salivary flow/secretions
* Older population
* Increased Candidal infection
31
Xerostomia: Etiology
* Development
* salivary Gland Aplasia
* Water/Metabolite loss
* Iatrogenic
* medication
* Radiation
* Chemotherapy
* Systemic Disease
* Sjogren's
* Local factors
* Smoking
* mouth breathing
32
Xerostomia: Clinical Features
* _Saliva is thick and “ropey”_
* Mucosa appears dry
* glove sticks to mucosal surfaces
* Dorsal tongue-fissured w/atrophy of filiform papillae
33
Xerostomia: Treatment
* Salivary Stimulation
* pilocarpine
* 5-10mg
* 3-4x/day
34
Sjogren Syndrome
* AKA Sicca Syndrome
* immunological destruction of the salivary glands & lacrimal glands
* autoimmune condition
* Females 9x more than Male
* High Associations with RA
* Results in Xerostomia (Dry mouth) and Xerophthalmia (Dry eyes)
* Types:
* primary
* only immunologic disorders in the patient
* Secondary
* due to another autoimmune disease
35
Sjogren's Syndrome: Relationship with genetics
* HLA found in greater frequency
* HLA-DRw52
* both forms
* HLA-B8 & HLA-DR3
* primary SS
* EBV is related somehow
36
Sjogren's Syndrome: Clinical Features
* fi_ssured tongue w/atrophied papillae_
* Xerostomia
* _Altered Taste_
* Red and tender oral mucosa
* secondary candissais
* _⅓ to ½→enlargement of major salivary glands_
* increased risk of Sialadenitis and Lymphomas
37
Sjogrens Syndrome: Classification criteria
* must have 2 of 3
* + RO-SSA and/or La-SSB antigen
* or
* + RA and antinuclear antibody(ANA) titer ≥ 1:320
* **Labial Salivary gland biopsy:**
* **focal lymphocytic sialenditis**
* **focus score ≥ 1 focus/4mm**
* Keratoconjunctivitis siccca
* ocular staining score ≥4
38
Sjogren's Syndrome: Lab Tests
* Erythrocyte sédimentation rate=High
* Elevated serum Ig levels
* especially IgG
* + Rheumatoid Factor in 60% of cases
* **ANAs in 75-85% of patients:**
* **Ro (SS-A) and La (SS-B)**
39
Sjogren's Syndrome: Treatment
* Pilocarpine or cevimeline
* increased risk of lymphoma
* 40x higher than normal
* _B-cell monoclonality (MALT Lymphoma)_
40
Sialadensosis
* AKA Sialosis
* dysregulation of autonomic innervation of salivary acini→uncontrolled secretion
* Increased acini size
* Bilateral
41
Sialadenosis: Treatment
* control the underlying cause
* Endocrine disorders
* diabetes
* hypothyroidism
* pregnancy
* Nutritional conditions
* Alcoholism
* Eating disorders
* Neurogenic medications
42
Necrotizing Sialometaplasia
* inflammatory condition of the salivary glands
* local destruction
* ischemia→ infarction (obstruction of blood supply)
* Minor SG
* palate (most common)
43
Necrotizing Sialometaplasia: Causes
* Trauma
* poor fitting denture
* Previous Surgeries
* Eating disorders w/binge-purging
44
Necrotizing Sialometaplasia: Clinical Appearance
* Associated w/pain and paresthesia
* Unilateral (normally)
* Males 2x
* starts as swelling→turns into ulceration
* “a part of my palate fell out”
45
Necrotizing Sialometaplasia: Treatment
* None needed
* disappears in 5-6 weeks
46
Define Adenoma
* Benign neoplasm
* derived from glandular cells
47
Define Carcinoma
* Malignant neoplasm
* derived from epithelial cells
48
Define Sarcoma
* Malignant neoplasm
* derived from mesenchyme cells
* ex: fat, muscle, bone, blood vessels
49
Define Lymphoma
* Malignant neoplasm
* derived from lymphocytes
50
Define Melanoma
* Malignant neoplasm
* derived from melanocytes
51
Define: Germ Cell tumor
* Malignant neoplasm
* derived from germ cells
52
Salivary Gland Tumors
* 60-80% are parotid gland tumors
* the smaller the gland is, the greater the likelihood of malignancy
* except rare sublingual tumors
53
Pleomorphic Adenoma
* Aka Benign Mixed tumor
* Adults & Children=MOST COMMON
* can become carcinoma
* **PLAG1 gene mutation**
54
Pleomorphic Adenoma: Clinical Features
* Painless, slow growing
* Movable; Bigger=stiff
* Major SG= superficial lobe of parotid gland
* Minor SG= Palate
55
Pleomorphic Adenoma: Histo
* Major SG
* encapsulated
* Minor SG:
* partially encapsulated
56
Oncocytoma
* rare→1% of all salivary tumors
* Oncocytes:
* composed of large epithelial cells
* ⇡ Mitocondrial count= ⇡ eosinophilic granular cytoplasm
* inflammatory disorders or other situations that cause cellular stress
57
Oncocytoma: Clinical Features
* slow growing, painless mass
* Firm
* Location:
* Superficial Lobe of Parotid Gland
* Females
58
Papillary Cystadenoma Lymphomatosum
* AKA warthin tumor
* **parotid gland ONLY**
* near angle of mandible
* Etiology: uncertain
* proliferation of gland duct epithelium associated w/secondary formation of lymph tissue
* strong association w/ smoking
59
Papillary Cystadenoma Lymphomatosum: Clinical Features
* Exclusively parotid gland
* Firm or fluctuant to palpation
* older population (6-7th decade)
60
Canalicular Adenoma
* rare
* Upper Lip
* very/most common (75%)
* most common tumor here
* can be mistaken for mucocele
* normal or bluish color
61
Canalicular Adenoma: Histo
* Single layered cords of columnar or cuboidal epithelial cells
62
Basal Cell Adenoma
* Basaloid appearance of tumor cells
63
Basal Cell Adenoma: Clinical Features
* Slow growing, freely movable mass
* **Primary→Parotid Gland**
* **Secondary→minor salivary glands in upper lip and buccal mucosa**
64
Basal Cell Adenoma: Histo
* mostly encapsulated
* **jigsaw puzzle**
65
Ductal Papillomas
* Sialadenoma papilliferum
* minor salivary glands on palate
* Intraductal Papilloma
* Minor Salivary glands
* ill-defined borders
* submucosal swelling
* Inverted Ductal papilloma
* Lower lip and mandible vestibule
* asymptomatic nodules
66
Mucoepidermoid Carcinoma (MEC)
* most common malignant salivary gland tumor
* Location:
* Parotid gland=Most common
* If a minor salivary gland→palate
* may be mistaken as a mucocele
* Intraosseous tumors can develop in jaw
67
Mucoepidermoid Carcinoma: Histo
* 3 grades
* Low→ \<20% intracystic component
* intermediate→ Neural involvement
* high→ necrosis
68
Mucoepidermoid Carcinoma: Treatment
* Early stage:
* remove parotid
* preserve CN 7 (facial nerve)
* Late Stage:
* remove parotid & CN7
* Minor glands
* excision
* Post operative radiotherapy
69
Mucoepidermoid Carcinoma: Prognosis
* Submandibular is worse than parotid
* Early stage-good
70
Mucoepidermoid Carcinoma: Intraosseous manifestation
* Most common intrabony salivary tumor
* looks like odontogenic cyst/tumor
* Females
71
Acinic Cell Carcinoma
* Serous Acinar differentiation
* Parotid Gland
* slow growing mass for months or years
* asymptomatic
* Mitotic activity=rare
72
Secretory Carcinoma
* similar to secretory carcinoma of breast
* Parotid gland
* most common
* Genetic:
* Translocation= ETV6-NTRK3 fusion gene
* Low grade malignancy
* good prognosis
73
Adenoid Cystic Carcinoma
* Minor salivary glands=most common
* Palate
* Females
74
Adenoid Cystic Carcinoma: Clinical Features
* Pain as the tumor grows
* dull ache that gets worse
* can cause facial paralysis
* ulceration of mucosa over tumor
* Tumor in palate or maxillary sinus→ radiographic bone destruction
75
Adenoid Cystic Carcinoma: Histo
* **Swiss cheese appearance**
* Perineural invastion
76
Adenocarcinoma No Otherwise Specified (NOS)
Types
* Microsecretory Adenocarcinoma
* Carcinoma Ex Pleomorphic Adenoma
* Salivary Duct Carcinoma
77
Microsecretory Adenocarcionma
* Type of Salivary Adenocarcinoma NOS
* Low grade
* use RNA sequencing for diagnosis
78
Carcinoma Ex Pleomorphic Adenoma
* Type of Salivary Adenocarcinoma NOS
* Malignant transformation of Pleomorphic adenoma
* Mass present for long time
* Most common in parotid
79
Salivary Duct Carcinoma
* Type of Salivary Adenocarcinoma NOS
* Resembles High-grade breast ductal cancer
* 90% are HIGH GRADE