Sluggish schizophrenia
Sluggish schizophrenia or slow progressive schizophrenia (Russian: вялотеку́щая шизофрени́я, romanized: vyalotekushchaya shizofreniya) was a diagnostic category used in the Soviet Union to describe what was claimed to be a form of schizophrenia characterized by a slowly progressive course; it was diagnosed even in patients who showed no symptoms of schizophrenia or other psychotic disorders, on the assumption that these symptoms would appear later. It was developed in the 1960s by Soviet psychiatrist Andrei Snezhnevsky and his colleagues, and was used exclusively in the USSR and several Eastern Bloc countries, until the fall of Communism starting in 1989.