<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A disorder characterized by a circumscribed, inflammatory and necrotic erosive lesion on the mucosal surface of the anal canal.</n0:def-definition><n0:def-source>CTCAE</n0:def-source></n0:ComplexDefinition>
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A painful tear in the lining of the anal canal, often accompanied by bleeding on defecation. It is usually the result of a traumatic bowel movement or anal sexual penetration.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>