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PS1.1-3 | Introduction to Psychiatry — PBL Case

CLINICAL SETTING

You are a final-year MBBS student on your psychiatry posting at a tertiary care teaching hospital. The psychiatry outpatient clinic is moderately busy on a Monday morning. Your tutor introduces you to a new patient.

Trigger 1: The Referral Letter

A 52-year-old male professor of engineering, Professor R.K., is referred by his general practitioner with the following note: 'Dear Psychiatry Team, Please see Professor R.K., a 52-year-old male, referred by his wife with concerns about his behaviour over the past three weeks. He has been sleeping only 2-3 hours per night without apparent fatigue, spending large sums of money on impulsive purchases (including three motorcycles and an overseas holiday he cannot afford), and has been sending lengthy emails to his department head with plans to 'revolutionise global engineering education.' His wife describes him as completely unrecognisable. He has been otherwise well, with no known chronic illnesses. No medications. No alcohol. Family history: his mother was hospitalised twice for an unspecified 'nervous breakdown' in her 50s. Vital signs today: BP 124/78 mmHg, HR 92 bpm, Temperature 37.1°C, SpO2 98% on room air. Physical examination was unremarkable. I am concerned about his mental state and request your urgent assessment.' Before seeing the patient, your tutor presents this referral to the group.

DISCUSSION POINTS

  • What is your initial differential diagnosis based on the referral letter? List at least three possibilities, applying the organic-functional and neurotic-psychotic classification framework (PS1.1).
  • What information in the referral letter suggests an organic cause should be actively excluded before a functional psychiatric diagnosis is made? What investigations would you request and why?
  • The GP notes a family history of 'unspecified nervous breakdown' in the mother. How does family history inform psychiatric classification and diagnosis in this case?
  • What are your learning issues at this stage? Identify the gaps in your knowledge that will guide your self-directed preparation before Trigger 2.
Click to reveal Trigger 2: The Interview — and the MSE (discuss previous trigger first!)

Trigger 2: The Interview — and the MSE

Your tutor interviews Professor R.K. with the group observing. The following is a summary of the consultation: Appearance and Behaviour: The patient arrives dressed in a bright orange kurta and two scarves, despite the warm weather. He is well-groomed but his eyes are wide and darting. He cannot sit still — he gets up twice to look out of the window during the interview. He maintains poor eye contact, appearing distracted. Speech: Rapid, pressured, and loud. It is difficult to interrupt him. His sentences begin before the previous one is complete. Mood: 'I have never felt better in my life — I have the energy of a 25-year-old and the vision of a genius. I am at the peak of my powers.' Affect: Elevated, expansive, and occasionally irritable when his ideas are questioned. Congruent with reported mood. Thought Form: Flight of ideas. He begins describing his education plan, then segues to the Indian Space Research Organisation, then to his wife's cooking, then to quantum physics — all within 90 seconds, with loosely discernible links. Thought Content: Grandiose beliefs — he states he has been 'chosen' to lead India's education revolution. He does not believe these ideas are delusional ('It's not a belief — it's a fact'). No homicidal ideation. When asked directly about suicidal ideation, he dismisses it: 'Why would I die? I have too much to accomplish.' Perceptions: Denies hallucinations. No illusions. Cognition: Oriented to time, place, and person. Serial 7 subtraction: completed rapidly but with two errors (skips 65, gives 44 instead of 42). Recall: 3/3 at 5 minutes. Insight: 'I do not have a mental illness. My wife brought me here because she is jealous of my success. The only problem is that doctors cannot think at my level.' Judgement: When asked what he would do if he found a stamped addressed envelope, he says: 'Post it — but first I would open it in case it contained a funding opportunity for my project.' His wife, interviewed separately, confirms: three weeks ago he suddenly stopped sleeping, began speaking non-stop, and spent Rs 18 lakh in 10 days. There is no prior psychiatric history.

DISCUSSION POINTS

  • Document Professor R.K.'s MSE using the eight-domain structure (Appearance/Behaviour, Speech, Mood, Affect, Thought Form, Thought Content, Perceptions, Cognition, Insight, Judgement). Use correct psychiatric terminology (PS1.3).
  • Apply the neurotic-psychotic and organic-functional classification axes to this presentation (PS1.1). Is this neurotic or psychotic? Organic or functional? Justify your answer using specific MSE findings.
  • The wife's account is critical. What principles of psychiatric history-taking guided the decision to interview her separately? What specific information did her account add that the patient would not or could not provide (PS1.2)?
  • Professor R.K.'s suicidal ideation question was answered with dismissal. How should suicidal risk always be assessed in a psychiatric interview, even when the patient appears euphorically well?
Click to reveal Trigger 3: Formulation, Classification, and the Road Ahead (discuss previous trigger first!)

Trigger 3: Formulation, Classification, and the Road Ahead

After the consultation, your tutor asks the group to formulate the case. The investigations requested by the GP have returned: FBC, LFT, RFT, TFT, serum calcium, fasting glucose, urine toxicology — all within normal limits. CT brain: no structural abnormality. Urine toxicology: negative for amphetamines, cocaine, and cannabis. Your tutor then adds: 'Professor R.K.'s wife asks to speak to you privately. She says he had a very similar episode — though briefer and less severe — four years ago, which resolved on its own after three weeks. At that time, no medical help was sought. She also recalls that following that episode, he spent several months feeling 'flat, tired, and worthless,' during which he barely left the house. He has been well for the past three years.' The tutor then raises the following question to the group: 'In India, if Professor R.K. refuses admission and refuses all treatment, what are our obligations under the Mental Healthcare Act 2017?'

DISCUSSION POINTS

  • With normal investigations excluding organic causes, formulate a provisional ICD-11 and DSM-5 diagnosis. State the specific criteria met, including duration thresholds and required symptom domains. What is the significance of the previous episode four years ago and the subsequent depressive phase? (PS1.1)
  • Revisit the psychiatric history: how does the information disclosed by the wife in Trigger 3 change or strengthen the diagnosis? What does this illustrate about the importance of collateral history in psychiatric assessment (PS1.2)?
  • Under the Mental Healthcare Act 2017, under what conditions can Professor R.K. be admitted involuntarily? Does he currently meet those criteria? What are the clinician's ethical and legal duties if he refuses treatment but is at risk? (PS1.2, medicolegal)
  • Synthesise the learning from this case: what is the single most important clinical skill you will carry forward from this PBL — and how will you apply it in your future clinical practice?

Learning Issues

Research these questions and bring your findings to the discussion.

  1. [PS1.1] What are the diagnostic criteria for a manic episode and bipolar disorder in ICD-11 versus DSM-5, including the minimum duration of symptoms and required features? How does the neurotic-psychotic and organic-functional classification apply to this presentation?
  2. [PS1.2] What are the standard domains of the psychiatric history, and when is collateral history from a relative clinically indispensable? How should the direct assessment of suicidal and homicidal ideation be conducted even when the patient does not appear at risk?
  3. [PS1.3] What are the eight domains of the MSE, and how are they applied to document this patient's current mental state? What is the distinction between mood (subjective) and affect (observed), and between flight of ideas and loosening of associations?