I have to disagree with you all.  I am a Type A personality, am on medication to balance the aggressive behaviour.  I do believe that if a group of characteristics, in an identified coctail of behaviour can adversely affect your health (stress induced heart attack, manic-depression, ovarian cysts, to name those I am aware of) then it warrants the term 'syndrome'.  'Treatment' could help a number of people to greatly improve their quality of life and their relationships with friends and family.  Treatment does not necessarily medication, but would include lifestyle changes, self-discipline coaching and/or diet.  Regards, Mrs 'Type A'