Which statement aligns with the guideline that suspicious late onset or absence of stressors should prompt consideration of medical mimics?

• A. Be suspicious when onset is late in life (a first psychotic break after age 40) or when no stressors are present
• B. Be suspicious when onset is late in life only if a stressor is present
• C. Be suspicious when onset is late in life (a first psychotic break after age 40) or when no stressors are present
• D. Be suspicious only after comprehensive physical testing

Answer: (A)

The key idea is that a first psychotic episode that begins late in life or occurs without any clear psychosocial triggers should prompt you to consider medical mimics rather than assuming a primary psychiatric illness. When psychosis emerges after age 40, it’s uncommon for a typical primary psychotic disorder to present for the first time, so an organic cause becomes a priority. Similarly, the absence of identifiable stressors can be a clue that something medical or substance-related is driving the symptoms rather than a conventional mood or thought disorder.

In practical terms, this means you should pursue a medical workup to rule out conditions that can imitate psychosis, such as delirium or metabolic disturbances, thyroid problems, infections, autoimmune encephalitis, brain tumors, or drug- or toxin-induced states. Early recognition of these mimics can change management and prognosis, guiding targeted treatment rather than defaulting to psychiatric interventions alone.

Statements that require a stressor to trigger suspicion miss late-onset cases, and waiting for extensive physical testing before considering mimics can delay necessary evaluation. The emphasis on late onset or absence of stressors best captures why a medical workup is warranted in these scenarios.