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Necrotizing sialometaplasia of major salivary glands
1Department of Pathology, University of Texas M. D. Anderson Hospital and Tumor Institute, Houston 77030.
Abstract:
Major salivary glands have been rarely reported as sites of necrotizing sialometaplasia, a disease primarily affecting minor salivary tissue, particularly that of the palate. Eight cases of necrotizing sialometaplasia of the parotid and submandibular glands are presented and added to six reported earlier by Donath (1979). The clinical and pathologic findings in the 14 cases give strong support to the vascular-based-infarct genesis of necrotizing sialometaplasia.
Insights
Necrotizing sialometaplasia, typically affecting minor salivary glands, is rarely found in major salivary glands. This study presents 14 cases, supporting an infarct-based origin for this condition.
Area of Science:
- Oral Pathology
- Salivary Gland Diseases
- Surgical Pathology
Background:
- Necrotizing sialometaplasia (NS) is an uncommon ulcerative condition.
- NS predominantly affects minor salivary glands, especially on the palate.
- NS in major salivary glands is exceptionally rare.
Purpose of the Study:
- To document and analyze cases of necrotizing sialometaplasia occurring in major salivary glands.
- To further elucidate the clinicopathologic features of NS in these rare locations.
- To reinforce the understanding of NS pathogenesis.
Main Methods:
- Retrospective review of eight new cases of NS in the parotid and submandibular glands.
- Compilation and analysis of these cases with six previously reported instances.
- Correlation of clinical presentation with histopathologic findings.
Main Results:
- Eight new cases of major salivary gland NS were identified.
- A total of 14 cases (including prior reports) were analyzed.
- Clinical and pathological data supported a vascular-based infarct genesis.
Conclusions:
- Necrotizing sialometaplasia can occur in major salivary glands, though infrequently.
- The findings support the hypothesis that NS originates from vascular infarction.
- Further research into the vascular mechanisms of NS is warranted.