A general term that covers a range of hostile behaviours, some of which may extend beyond normal social behaviour. Some physical diseases cause aggressive outbursts: temporal lobe EPILEPSY and hypoglycaemia (see DIABETES MELLITUS) are examples. Certain psychiatric disorders – such as antisocial personality disorders, alcohol or drug abuse, and SCHIZOPHRENIA – may be associated with aggression. In ONCOLOGY tumours are sometimes referred to as ‘aggressive’ if they are observed to enlarge and/or spread rapidly.