Schizophreniform and brief psychotic disorder — structured clinical viva

Working diagnosis. At 12 days, with abrupt onset after marked stressor and good premorbid function, the best DSM-facing working label is brief psychotic disorder (with marked stressor) — provisional until the episode fully remits within 1 month or the clock forces a longer label. Schizophrenia is premature. If symptoms continue past 1 month without yet reaching 6 months, revise toward schizophreniform. ICD framing may use ATPD language depending on the system specified.^[1][2][4]

Good features. Abrupt onset, stressor colour, perplexity, non-blunted affect, good premorbid function — hopeful modifiers, not a reason to stop care.^[1]