[Pitfalls in diagnosis of idiopathic Parkinson syndrome].

In general the diagnosis of idiopathic Parkinson's disease is considered to be easy and safe. In the last few years several studies have demonstrated that this in reality is not the case. A number of other syndromes have to be differentiated from idiopathic Parkinson's disease. One must be aware that in substantial number of cases the natural history has to be observed before a safe diagnosis can be made.