<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A role used to represent that particular neoplastic cell types will only be present in some cases of the disease. The domain and the range for this role are 'Disease, Disorder or Finding' and 'Abnormal Cell', respectively.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>