In summary, the classic DSM-IV subtypes of schizophrenia provide
a poor description of the heterogeneity of schizophrenia, have low
diagnostic stability, do not exhibit distinctive patterns of treatment
response or longitudinal course, and are not heritable. Except for
the paranoid and undifferentiated subtypes, other subtypes are rarely
diagnosed. As a result, these subtypes of schizophrenia were eliminated
from DSM-5