Diseases of-salivary-glands

Done by : Weam Mahmoud Faroun
Fifth year dental student
Medicine

1. Diseases of salivary glands
Done by : WeamMahmoudFaroun
Student Number : 21410298
submitted to DR.GhassanHabash

2. •The three major salivary glands are the
parotid gland, submandibulargland (also
called the submaxillarygland) and sublingual
glands.
•The minor salivary glands found in almost
every part of the oral cavity ,except the
gingivaand anterior region of the hard palate

4. Functions of saliava

5. Salivary gland disease
1. Sialadenitis
2. Obstuctiveand traumatic leasins
3. Sjogrensyndrome

6. 1. Sialdenitis
Bacterial Viral
Post-
irratioation
sarcoidosis

7. Sialdenitis
•Inflammatory disorders of the majorsalivary
glands are usually the result of bacterial or
viral infection but occasionally sialadenitisis
due to other causes, such as trauma,
irradiation, and allergicreactions.

8. Bacterial sialadenitis
Acute
Chronic

9. Acute bacterial sialadenitis
•This uncommon disorder principally involves
the parotid gland.
•Acute paroritisis an ascending infection, char
is, the bacteria reach the gland from rhe
mouth by ascending the ductalsystem, the
main organisms involved being Streptococus
pyogenesand Staphyfococusaureus. Less
commonly, Haemophifmspecies or members of
the 'black-pigmented bacteroides' group may be
isolated.

10. •It was once a common postoperative complication in
debilitated and dehydrated patients, particularly
following abdominal surgery, but is a rare
complication nowadays.
•Reduced salivary flow is the major predisposing
factor, and acute parotitismay occur in patients with
Sjogrensyndrome or following the use of drugs
with xerostomicside-effects.
•Acute infection may also arise in
immunocompromisedpatients or as a result of acute
exacerbation in a previously chronic sialadenitis. The
latter is usually the cause when acute sialadenitis
involves the submandibulargland.

11. Diagnosis
•The onset of acute sialadenitisis rapid.
Clinically, it presents as swellingof the
involved gland accompanied by pain, fever,
malaise, and redness of the overlying skin.
Pus may be expressed from the affected
duct and painis radiated to the ear and the
temporal area
•Lymphoadenopathyof cervical lymph nodes

12. •An aspirated sample of pus should be obtained
by placing a fine catheter in the duct, a
microbiological swab of the discharge is likely to
be contaminated by a mixed saliva.
•Antibiotic sensitivity should be routinely
requested along with identity of microorganisms.
•However, because the results of culture and
sensitivity tests may not be available for 2-3 days,
the initial choice of therapy may have to be based
on information obtained from a gram stain of the
pus sample.

15. Treatment
•Antibiotic therapy should be started early,
with amoxicillinas the agent of first choice.
•A loading dose of 3 gamoxicillin may be
prescribed prior to therapy of (250-500mg) 3
times daily for 5 days.
•Flucloxacillinis a good choice.
•Alternatively, erythromycin may be prescribed
for patients with a hypersensitivity to the
penicillin group.

16. Chronic bacterial sialadenitis
•Chronic sialadenitisof the major salivary
glands is usually a non-specific
inflammatory disease associated with duct
obstruction,most often due to salivary
calculi and low-grade ascending infection.
•The submandibulargland is much more
commonly involved than the parotid gland.

17. •In cases where no cause of obstruction can
be identified, the predisposing factor may be a
disorder of secretion resulting in decreased
salivary flow.
•The sialadenitisis usually unilateral, and the
symptoms of recurrent tender swelling of the
affected gland are mainly related to the
associated obstruction.
•The duct orifice may appear inflamed and in
acute exacerbations there may be a purulent or
salty-tasting discharge.

18. Histological examination
•shows varying degrees of
•1. dilatation of the ductalsystem
•2. hyperplasia of duct epithelium
•3. periductalfibrosis
•4. acinaratrophy with replacement fibrosis
•5. chronic inflammatory cell
•The duct obstruction, destruction of glandular
tissue, and duct dilatation (sialectasia) may be
demonstrated by sialography.

21. Treatment
•The principles of treatment are exactly the
same as those of acute sialadenitis.

22. Recurrent parotitis
•Recurrent parotitisis a raredisorder which
can affect children or adults.
•Rarely the adult form may follow on from
the childhood type, but in most cases it is
probably due to persistence of factors, such
as calculi or duct strictures, leading to
recurrent attacks of low-grade ascending
infection.

23. Treatment
•The condition may require long-term
antibiotic therapy, but symptoms generally
resolve around the time of puberty.

24. Viral sialadenitis
•Mumps (epidemic parotitis)
•It is the commonestcause of parotid
enlargementand the commonest of all the
salivary gland diseases.
•Although infection can occur at any age, it is
most common in childhood. The virus is
transmitted by direct contact with infected
saliva and by droplet spread, and bas an
incubation period of 2-3 weeks.

25. •Non-specific prodromalsymptoms of fever and
malaise are followed by painful swelling of
sudden onset involving one or more salivary
glands.
•In addition to salivary gland swelling, pain and
tenderness, patients may complain of headeche.
•The parotid glands are almost always involved,
bilaterally in about 70 per cent of cases, and
occasionally the submandibularand sublingual
glands may be affected, but rarely without
parotid involvement

26. •The salivary gland enlargement gradually
subsides over a period of about 7 days. The
virus is present in the saliva 2-3 days before the
onset of sialadenitisand for about 6 days
afterwards.
•Occasionally in adults other internal organs are
involved, such as testes, ovaries, central nervous
system, and pancreas.
•Orchitisis the most common complication,
occurring in about 20 per cent of cases of mumps
in adult males.

28. •The diagnosis of mumps is usually made on
clinicalgrounds,butin atypical cases can be
confirmed by the detection of IgMclass
antibodies and by the rise in serum antibody
titreco mumps virus antigens which occurs
within the first week.
•After an attack immunity is long-lasting and
so recurrent infection is rare.
Diagnosis

29. Treatment
•Symptomatic treatment with the use of
antipyretics, simple analgesics, fluid intake
and rest.
•Isolation is important

31. Postirradiationsialadenitis
•Radiation sialadenitisis a common complication
of radiotherapy and there is a direct
correlation between the dose of irradiation
and the severity of the damage.
•The latter is often irreversible leading to
fibrous replacement of the damaged aciniand
squamousmeraplasiaof ducts, but with less
severe damage some degree of function may
return after several months.
•Serous aciniare more sensitive to radiation
damage than mucous acini.

32. Sarcoidosis
•Sarcoidosismay affect the paroridand
minor salivary glands.
•Paroridinvolvement presents as persistent,
often painless, enlargement and may be
associated with involvement of the lacrimal
glands in Heerfordtsyndrome.

35. Obstructive and traumatic lesions
•important factors in the aetiologyof a number of
salivary gland diseases, such as chronic sialadeniris
in major glands and mucocelesin minor glands
•Duct obstruction may be due to a blockage within the
lumen or result from disease in or around the duct
wall, such as fibrosis or neoplasia. It can involve any
part of the ductaltree.
•Obstruction to the duct orifice is usually due to
chronic trauma, for example from sharp cusps or
overextended dentures, resulting in fibrosis and
stenosis

36. Salivary calculi (sialoliths)
•Salivary calculi cause obstructionwithin the duct lumen
and can occur at any age, but are most common in
middle-aged adults.
•Calculi may form in ducts within the gland or in the
main excretory duct.
•submandibulargland is mostfrequently involved,
accounting for about 70-90 per cent of cases
•The parotid gland is the next most commonly involved,
whereas sialolirhiasisin sublingual and minor glands is
uncommon and generally accounts for only about 2 per
cent of cases
•Calculi are usually unilateral, although multiple stones in
the same gland are not uncommon .

37. Symptoms
•The typical signs and symptoms of calculi associated
with major glands are pain and sudden enlargement
of the gland, especially at meal times when salivary
secretion is stimulated.
•The reduction in salivary flow predisposes to
ascending infection and chronic sialadenitis.
•The calculi may be detected by palpation and on
radiographs, and may be round or ovoid, rough or
smooth, and vary considerably in size.
•They are usually yellowish in colourand comprise
mainly calcium phosphates with smaller amounts of
carbonates

38. Diagnosis
•Clinically, there may be no abnormality at the time of
examination, although stimulation of salivary flow may
produce obvious extra-oral swelling of the affected
gland.
•Intraorallya calcified deposit may be seen at the
orifice or may be palpable within the duct.
•Radiography is helpful in confirming the diagnosis and
may reveal the presence of multiple lesions.
•However, not all calculi are radiopaqueand therefore
sialography, which will also detect the presence of
mucous plugs, may be required.

43. Treatment
•At the present time, surgical removal of salivary caculi
is the treatment of choice.
•If the deposits are present at the anterior part of the
duct or its orifice, then a temporary suture should be
placed distal to the calculus to prevent any posterior
displacement during removal.
•A scalpel or dissecting scissors may be used to open
the orifice of the duct to gain access to the calculus.
•It is often preferable to either leave the wound open
or suture the edges to adjacent mucosa because
attempts at complete closure are likely to result in
occlusion of the duct lumen.

44. •Consideration has to be given to removal of the
gland when the calculus is either positioned
distally in the duct or within the gland itself.
•Intraglandularcalculi, particularly those
occurring in the submandibulargland, can reach
a surprisingly large size without producing clinical
symptoms and these first detected as an
incidental findings on radiographs.
•Sialographyshould be performed 2-3 weeks after
the removal of any calculus to determine the
presence of structural gland damage

45. •There is evidence from salivary glands studies
using radioisotopicscanning that a previous
history of calculi within the submandibular
duct does not result in permanent reduction
of gland function.
•The same is probably not true of the parotid
gland, is composed mainly of serious acinar
cells which are likely to undergo atrophy
under back-pressure

46. Necrotizing sialometaplasia
•Necrotizing sialometaplasiais a relatively
uncommondisorder which clinically and on
histological examination may be mistaken for
malignant disease.
•It occurs most frequently on the hard plate in middle-
aged patients and is about twice as common in men
as women.
•It presents most commoalyas a deep crater-like
ulcer which may mimic a malignant ulcer and which
may take up to 10-12 weeks to heal (self limiting ).
•In some cases the ulcer may be preceded by an
induratedswelling.

48. Sjogrensyndrome
•Sjogrensyndrome is a chronic autoimmune
disease characterized by lymphocytic infiltration
and acinardestruction of lacrimaland salivary
glands, leading to dry eyes and dry mourh.
•In about half of the cases the syndrome occurs
in association with another autoimmune
disease, most frequently rheumaroidarrhririsor
systemic lupus eryrhemarosis.

49. •On this basis the syndrome is
divided into:
•primary Sjogren syndrome
•secondary Sjogren syndrome

50. •(1) primary Sjogrensyndrome -the
combination of dry mouth (xerosromia), and
dry eyes (xerophrhalmiaor keraroconjuncrivitis
sicca)
•(2) secondary Sjogrensyndrome -the triad of
xerosromia, xerophthalmia, and an autoimmune
connective tissue disease (usually rheumatoid
arthritis)

52. •Primary Sjogrensyndrome is also known as
the siccasyndrome. Unless otherwise
specified, the general term 'Sjogren
syndrome' is used to encompass both types.
•Sjogrensyndrome predominantly affects
middle-aged females the female:maleratio
is about 9:1)
•symptoms related to dryness and soreness of
the mouth and eyes are common
presentations.

53. •Xerostomiamay be associated with difficulty
in swallowing and speaking, increased fluid
intake, and disturbances of taste.
•In addition, it predisposes to oral
candidosis, bacterial sialadenitis, and
dental caries. The oral mucosa appears
dry, smooth, and glazed; lingual changes
may be prominent, the dorsum of the
tongue often appearing red and atrophic
and showing varying degrees of fissuring
and lobulation

55. •Kerato-conjuctivitissiccamanifests as dryness of
the eyes with conjunctivitis, and causes a gritty,
burning sensation
•Salivary gland enlargement is very variable.
Although approximately 30 per cent of patients
may give a history of such enlargement it is only
clinically apparent in about half that number.
•The enlargement is usually bilateral,
predominantly affects the parotid glands , and is
seldom painful.
•Lacrimalgland enlargement is uncommon.

58. •Clinical involvement of the minor salivary
glands is uncommon but they are involved at a
microscopic level. The glands show focal
collections of lymphoid cells, initially around
the intralobularducts , and the number of such
foci reflects the overall severity of the disease.
•The semi-quantitative assessment of this focal
lymphocytic sialadenitisin biopsies of labial
minor salivary glands is an important
investigation in establishing a diagnosis of
Sjogrensyndrome and forms one of the
internationally agreed diagnostic criteria.

59. •Other investigations useful in assessing the
degree of salivary gland involvement include
estimation of parotid salivary flow rates, which
are usually reduced, and sialography, which
shows varying degrees of sialectasisoften
producing a 'snowstorm' or 'cherry tree in
blossom'-like appearance.
•Salivary scintiscanningusing [99Tcm]
pertechnetateis also of value. The radioisotope
is concentrated in salivary glands and its
uptake is reduced in patients with Sjogren
syndrome.

61. •A variety of circulating autoantibodiescan also be
detected of which antibodies to the nuclear antigens
known as Ro and La (also referred roas SS-A and SS-
B, respectively) are the most important diagnostically.
•Anti-Ro antibodies are found in about 75 per cent of
patients with primary Sjogrensyndrome and are also
found in patients with secondary Sjogrensyndrome.
•Anti-la can also be detected in 40 per cent (or
more with sensitive assays) of patients with Sjogren
syndrome.
•The detection of anti-Ro and anti-La antibodies is
another important invesrigarionin establisbinga
diagnosis of Sjogrensyndrome.

62. •In both primary and secondary Sjogrensyndrome there
is a risk of B cell malignant lymphoma arising within
an affected gland
•Malignant change usually occurslate in the course of
the disease and may be associated with increased
swelling of the affected gland
•The development of lymphoma is associated with
proliferation of atypical lymphoid cells around the
epithelial islands . As the malignant population
expands there is destruction of the islands,
replacement of the inflammatory lymphoid infiltrate,
and obliteration of interlobular sepraleading to
diffuse infiltration of the gland by neoplasticcells.

63. Diagnosis
•Based on results of a number of tests, including stimulated
parotid salivary flow rates, lacrimalflow rates Schirmer
test), labial gland biopsy, sialographyand immunological
studies.
•Sialometry–low salivary stimulated flow rate (less than 7
ml/min).
•Labial gland biopsy-lymphocytic infiltration, duct dilatation
and acinarloss.
•Autoantibodiesscreen-positive autoantibodies, in
particular rheumatoid factor, antinuclear.
•Sialographywill show sialectasis
•Persistanceswelling of the glands can be investigated by a
more modern technique particularly MRI, give much better
picture of soft tissue lesions and are essential if a tumor
suspected.

66. Treatment
•Treatment of the oral component of Sjogren’s
syndrome essentially consists of alleviating the
symptoms of xerostomia(salivary substitutes),
treating candidalinfection and preventing dental
caries and periodontal disease.
•If there is any clinical suspicious of tumor
developing in any gland, then imaging and biopsy
is mandatory.
•Persistent parotid swelling in SS needs parotid
biopsies because this lesion may progress to B-
cell lymphomas.

67. References
•Tyldesley'sOral Medicine Anne Field & Lesley
Longman _5
th
Ed
•Oral Pathology J. V. Soames& J. C. Southam
_4
th
Ed