Is depression severity the sole cause of psychotic symptoms during an episode of unipolar major depression?
Individuals with a predisposition to psychotic features tend to display such features during more severe episodes of depression. However, patients with no history of psychosis may experience non-psychotic depressive episodes of equal or greater severity, in terms of depressive symptomatology, compared to patients with psychotic depression. Thus, there is individual variation in susceptibility to psychosis during mood episodes and severity is not the sole determinant.
Post-operative ETV should be considered the best option to treat persistent hydrocephalus after the removal of posterior fossa tumours.