Necrotizing sialometaplasia is an uncommon condition that is putatively caused by interruption of blood flow to a focal area of the palate, resulting in ischemic necrosis of the palatal salivary gland tissue in the area. Most patients are adults, and most series report a slight male predilection. The palate is the most common site of involvement, although the tongue, buccal mucosa, and parotid gland may be affected.
Patients may have a spectrum of symptoms, but usually patients initially notice a unilateral area of swelling of the posterior hard palate. This may be accompanied by a sensation of pain, paresthesia, or numbness. Subsequently, the necrotic tissue sloughs off leaving an ulcer and granulation tissue, and healing ensues. Some investigators have suggested that cigarette smoking may be a risk factor for this condition. Other associations include excessive use of local anesthesia with vasoconstrictors, Buerger disease, and bulimia.
Necrotizing sialometaplasia usually evolves rather quickly, and after the ulceration develops, healing by secondary intention may take weeks or 1-2 months, depending on the size of the defect.
Necrotizing sialometaplasia - Oral Mucosal Lesion
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Codes
ICD10CM:
K11.8 – Other diseases of salivary glands
SNOMEDCT:
109769000 – Necrotizing sialometaplasia
K11.8 – Other diseases of salivary glands
SNOMEDCT:
109769000 – Necrotizing sialometaplasia
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Last Updated:08/30/2012
Necrotizing sialometaplasia - Oral Mucosal Lesion