Explain delusional disorder and safety plan — CASC communication station · Psych CASC / OSCE

Prompt

Partner of a 44-year-old man with a working diagnosis of delusional disorder, jealous type, wants a clear explanation of the diagnosis, why it is not ‘just jealousy,’ what treatment involves, and how to stay safe at home.

Station brief

Format. Communication station, approximately 7–10 minutes after reading time. You are the psychiatry registrar in the community team. The examiner plays the partner. [1]

Candidate instructions. Explain the working diagnosis of delusional disorder (jealous type) in plain language, distinguish it from ordinary jealousy and from schizophrenia, outline engagement and medication rationale, address safety at home, and check understanding. Do not invent foreign legal section numbers. [1][2][3]

Candidate scenario

Your patient has a fixed multi-month belief that his partner is unfaithful, with phone-checking and following behaviours, no prominent hallucinations, and continued employment. Current plan: aripiprazole starting 5–10 mg daily with monitoring, alcohol reduction, and close risk review. Partner asks: "Is he a schizophrenic? Should I just leave now? Will medicine make him admit he is wrong?" [1][5][3]

Marking domains

Empathy, structure, agenda-setting
Accurate plain-language explanation of partial psychosis / delusional disorder vs schizophrenia and vs ordinary jealousy
Clear treatment rationale (alliance + antipsychotic; belief may soften gradually; Cochrane honesty if asked about certainty)
Explicit partner safety discussion (what to do if monitoring escalates, threats, weapons; crisis contacts; when to leave and call emergency services)
Balanced discussion of medication effects/monitoring without false guarantees
Check understanding and invite questions Mark against alliance quality, diagnostic accuracy, safety planning, and treatment honesty rather than forced belief surrender.[1][2][3][4]

Model communication map

Reveal communication map

Open and agenda. Thank partner for attending; agree topics: what the diagnosis means, treatment, safety, questions. [3]
Diagnosis in plain language. A delusional disorder means a fixed false belief held with high conviction for months, here focused on infidelity (jealous type / Othello pattern). It is a form of partial psychosis — not the same as multi-symptom schizophrenia with voices and disorganisation, and not the same as ordinary jealousy that can be reasoned through. [1][2]
Why it matters. When the belief drives checking, following, or confrontation, risk of harm rises even if he still works. Safety planning is part of care, not a moral judgement. [3]
Treatment. We build trust without arguing him into submission on day one, and offer medicine (e.g. aripiprazole starting low, often 5–10 mg, aiming around 10–15 mg if tolerated) to reduce mental pressure and acting-on-belief. Evidence specific to this exact diagnosis is limited in large trials, but antipsychotics are standard clinical care with monitoring for restlessness, weight, and other side effects. Talking therapies can help when he engages. [4][5][3]
Safety plan. Agree warning signs (escalating monitoring, threats, weapons, heavy drinking). Provide crisis numbers; discuss leaving to a safe place; document who to call. If imminent danger — emergency services. Offer follow-up and carer support routes. [3]
Check understanding. "What will you do tonight if checking escalates?" Correct gently; close with follow-up time. [3]

References

[1]Opjordsmoen S Delusional disorder as a partial psychosis Schizophr Bull, 2014.PMID 24421383
[2]González-Rodríguez A, Seeman MV Differences between delusional disorder and schizophrenia: A mini narrative review World J Psychiatry, 2022.PMID 35663297
[3]Galletly C, Castle D, Dark F, et al. Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for the management of schizophrenia and related disorders Aust N Z J Psychiatry, 2016.PMID 27106681
[4]Skelton M, Khokhar WA, Thacker SP Treatments for delusional disorder Cochrane Database Syst Rev, 2015.PMID 25997589
[5]Iannuzzi GL, Patel AA, Stewart JT Aripiprazole and Delusional Disorder J Psychiatr Pract, 2019.PMID 30849061

Station brief

Format. Communication station, approximately 7–10 minutes after reading time. You are the psychiatry registrar in the community team. The examiner plays the partner. [1]

Candidate scenario

Marking domains

Empathy, structure, agenda-setting

Accurate plain-language explanation of partial psychosis / delusional disorder vs schizophrenia and vs ordinary jealousy

Clear treatment rationale (alliance + antipsychotic; belief may soften gradually; Cochrane honesty if asked about certainty)

Explicit partner safety discussion (what to do if monitoring escalates, threats, weapons; crisis contacts; when to leave and call emergency services)

Balanced discussion of medication effects/monitoring without false guarantees

Check understanding and invite questions Mark against alliance quality, diagnostic accuracy, safety planning, and treatment honesty rather than forced belief surrender.[1][2][3][4]

Model communication map

Reveal communication map

Open and agenda. Thank partner for attending; agree topics: what the diagnosis means, treatment, safety, questions. [3]
Diagnosis in plain language. A delusional disorder means a fixed false belief held with high conviction for months, here focused on infidelity (jealous type / Othello pattern). It is a form of partial psychosis — not the same as multi-symptom schizophrenia with voices and disorganisation, and not the same as ordinary jealousy that can be reasoned through. [1][2]
Why it matters. When the belief drives checking, following, or confrontation, risk of harm rises even if he still works. Safety planning is part of care, not a moral judgement. [3]
Treatment. We build trust without arguing him into submission on day one, and offer medicine (e.g. aripiprazole starting low, often 5–10 mg, aiming around 10–15 mg if tolerated) to reduce mental pressure and acting-on-belief. Evidence specific to this exact diagnosis is limited in large trials, but antipsychotics are standard clinical care with monitoring for restlessness, weight, and other side effects. Talking therapies can help when he engages. [4][5][3]
Safety plan. Agree warning signs (escalating monitoring, threats, weapons, heavy drinking). Provide crisis numbers; discuss leaving to a safe place; document who to call. If imminent danger — emergency services. Offer follow-up and carer support routes. [3]
Check understanding. "What will you do tonight if checking escalates?" Correct gently; close with follow-up time. [3]

References

[1]Opjordsmoen S Delusional disorder as a partial psychosis Schizophr Bull, 2014.PMID 24421383
[2]González-Rodríguez A, Seeman MV Differences between delusional disorder and schizophrenia: A mini narrative review World J Psychiatry, 2022.PMID 35663297
[3]Galletly C, Castle D, Dark F, et al. Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for the management of schizophrenia and related disorders Aust N Z J Psychiatry, 2016.PMID 27106681
[4]Skelton M, Khokhar WA, Thacker SP Treatments for delusional disorder Cochrane Database Syst Rev, 2015.PMID 25997589
[5]Iannuzzi GL, Patel AA, Stewart JT Aripiprazole and Delusional Disorder J Psychiatr Pract, 2019.PMID 30849061