What are the characteristics of minor aphthous ulcers (MiAUs)?

Updated: May 11, 2020
  • Author: Jaisri R Thoppay, DDS, MBA, MS; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Characteristics of MiAUs (ie, Mikulicz ulcers) include the following:

  • They occur mainly in persons 10-40 years of age.

  • They often cause minimal symptoms.

  • They are small round or ovoid ulcers 2-4 mm in diameter. (MiAUs are round or ovoid in most situations.)

  • They have an ulcer floor that is initially yellowish but assumes a gray hue as healing and epithelialization proceeds.

  • They are surrounded by an erythematous halo and some edema.

  • They are found mainly on the nonkeratinized mobile mucosa of the lips, cheeks, floor of the mouth, sulci, or ventrum of the tongue; they are uncommonly seen on the keratinized mucosa of the palate or dorsum of the tongue.

  • They occur in groups of only a few ulcers (ie, 1-6) at a time.

  • They heal in 7-10 days.

  • They recur at intervals of 1-4 months.

  • They leave little or no evidence of scarring.

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