[Problem of paranoia (based on follow-up data)].

Post-treatment examinations of 210 patients with stable and long-lasting paranoia states who had been treated both as in- and outpatients at the Institute of Psychiatry, the USSR Academy of Medical Sciences, in 1960 to 1966, have made it possible to differentiate 9 cases which corresponded in their clinical features to Kraepelin's paranoia. The long-term (for 14 to 20 years) catamnestic examinations showed that only in 2 patients signs of a slowly progressing schizophrenic process could be observed. In all other cases no signs of the progress of the negative changes were registered. Moreover, 5 patients showed a gradual reduction of the delusional disturbances. Data on hereditary aggravation are presented, and rightfulness of grouping paranoia with diseases of the schizophrenic spectrum is discussed. The results of the study point out that attempts at abolishing the problem of paranoia are premature.