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Canker sore (aphthous ulcer)

Canker sore (aphthous ulcer)

Overview

Canker sores (Aphthous ulcers) are very common. Typically, they are a shallow ulcer with a white or whitish/yellow base surrounded by a reddish border. This ulcer is seen in an individual with AIDS and is located in front and just below the bottom teeth.

Update Date 4/13/2013