[Clinico-geneaological study of paranoid schizophrenia].

On the basis of a comparative analysis of aggravated familial history in cases of paranoiac and neurosis-like schizophrenia (73 families in the main and control groups), the authors established accumulation of disturbances of "the paranoid spectrum" (delirious, paranoiac psychoses, paranoid anomalies of the personality) predominant in the families of the main group. This fact is interpreted in favour of a considerable role of constitutional and genetic factors in the genesis of paranoiac schizophrenia.