Quantitative distribution of inflammatory cells in recurrent aphthous stomatitis

Area of Science:

• Oral pathology
• Immunology
• Dermatology

Background:

• Recurrent aphthous ulcers (RAUs) are common oral mucosal lesions.
• The inflammatory infiltrate in RAUs is not fully characterized.
• Understanding the cellular dynamics of RAUs is crucial for diagnosis and treatment.

Purpose of the Study:

• To histologically quantitate and characterize leukocyte infiltrates in different stages of recurrent aphthous ulcers.

Main Methods:

• Biopsies of recurrent aphthous ulcers were obtained.
• Histologic examination focused on the types and distribution of leukocytes.
• Morphological distinctiveness of inflammatory infiltrates was assessed.

Main Results:

• Two distinct inflammatory infiltrates were identified in RAUs.
• Lymphocytes were consistently observed in pre-ulcerative lesions and ulcer margins.
• Polymorphonuclear leukocytes were predominant in areas of frank ulceration.

Conclusions:

• The cellular composition of the inflammatory infiltrate changes during RAU development.
• Distinct roles for lymphocytes and polymorphonuclear leukocytes in RAU pathogenesis are suggested.