cancer An instance of #$DiseaseType, and a specialization of #$AilmentCondition. Instances of #$Cancer may belong to any one of the many different types of disease that are studied and treated by oncologists. Instances of #$Cancer are characterized by abnormal (and usually rapid) growth of cells in some organ or system of the body; these growths are then prone to dispersal (metastasis) into other body regions. See also #$CancerFn. c0fd6a1a-9c29-11b1-9dad-c379636f7270