An ulcer is a crater-likesore on the skin or mucous membrane. Ulcers form when the top layers of skin or tissuehave been removed. They can occur inthe mouth, stomach, and otherparts of thebody.
Ulcers can be caused by inflammation or infection. Some ulcers may be caused by a cancer.
Habif TM. Principles of diagnosis and anatomy. In: Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 1.
Review Date: 11/20/2012
Reviewed By: Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.