Catastrophic schizophrenia
In psychiatry, catastrophic schizophrenia or schizocaria is an outdated term for a rare, acute form of schizophrenia leading to chronic psychosis and deterioration of the personality. Catastrophic schizophrenia was thought to be the most severe subtype of schizophrenia, as it had "an acute onset and rapid decline into a chronic state".
Source: Wikipedia — Catastrophic schizophrenia (CC BY-SA 4.0)