<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A category of psychiatric disorders which are characterized by the presence of physical symptoms that suggest a medical condition but are not fully explained by any known medical reasons.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>