Itis spontaneous condition of an unknown cause usually of the palate in whichlarge area of the surface epithelium underlying connective tissue and all theassociated minor salivary glands become necrotic while the ducts under gosquamous metaplasia.
Clinicalfeatures:
Usuallythe location is at the junction of the hard and the soft palatebut it may alsobe present at tongue, retromolar pad and the nasal cavity.
NSMis characterized by deep seated ulceration it is punched out
Within its deep crater are the gray granular lobules which represents the necroticminor salivary glands.
Itis 2-3 cm in diameter.
Itis asymptomatic but there may be numbness or burning pain.
Histopathology:
Inthe palatal epithelium there is no zone of ulceration which replaced by fibringranulation tissue.
Thelobules of minor salivary glands undergo coagulation necrosis.
Therescattered neurophils and foamy histocytes present in zone of necrosis.
Treatment:
Notreatment is required once the diagnosis is confirmed by histologicalexamination .
Theulcer area heals by its self with in 1-3 months.
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| Necrotizing Sialometaplasia |
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| Necrotizing Sialometaplasia |
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