Abstract
Does catatonia belong to schizophrenia or manic-depression? There's no answer to this question as far as each concept doesn't represent an entity but a type. It seems the particular problem, but it is related to the general one -Does any clinical entity exist within endogenous psychoses? The dichotomy of endogenous psychoses has not been established yet. It remains to be a hypothesis. Here a typical case of late catatonia is presented and its symptomatol-ogy is discussed. Then I refer to a genus and a type of a disease and look at the difference between them. In my opinion, as for endogenous psychoses, clinical psychiatry should be more involved in using clinical types efficiently than trying to achieve clinical entities (genera). Late catatonia is one of the few life-threatening types of metal disor-ders. From the point of view, it's not proposed as a clinical entity, but a very useful type and must be remembered in clinical settings.
