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Canker sore (aphthous ulcer)


Canker sore (aphthous ulcer)

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.




  • Review Date: 4/21/2006
  • Reviewed By: A.D.A.M. Medical Illustration Team. Previously reviewed by Michael Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network (1/17/2004).
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