Psych CASC / OSCE · General adult psychiatry — mood disorders
Explain melancholic vs atypical depression and treatment choices — CASC communication station
MRCPsych/FRANZCP-style communication station: explain melancholic vs atypical feature specifiers, treatment intensity differences, ECT thresholds, MAOI safety concept, and safety-netting.
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Target exams
Station brief
Format. Communication station, approximately 7–10 minutes active time after reading. You are the psychiatry registrar in a secondary-care mood clinic. [4]
Candidate instructions. Explain melancholic versus atypical feature labels in plain language, why treatment intensity can differ, when ECT is discussed, what an MAOI pathway would involve if ever considered, why bipolar screening matters, and how to seek help if risk rises. Check understanding with teach-back. [4][6]
Candidate scenario
Partner heard "atypical means not real depression" online. Patient fears ECT is punishment. Both want to know if "mood lifting a bit when friends visit" changes the diagnosis. [6]
Marking domains
- Empathy, structure, agenda-setting with patient and partner
- Accurate plain-language criteria (reactivity hinge; reverse vegetative vs classic vegetative)
- Corrects the myth that atypical means mild or fake
- Explains ECT as medical treatment for severe non-eating/high-risk melancholia, not punishment
- Mentions modern first-line antidepressants/therapy before specialist MAOI pathways
- Honest MAOI diet/interaction concept without scaremongering
- Bipolar screen rationale and suicide safety-net
- Teach-back [1][3][4][5]
Reveal assessor key
Open and agenda-set. Name time; ask top worries (fake label, ECT fear, friend's MAOI story). [4]
Explain hinge. "Both are patterns of a full major depression. Melancholic means the low mood barely lifts and sleep/appetite often go down with early waking. Atypical means mood can still lift a little to good news, but sleep and appetite often go up, limbs feel heavy, and rejection hurts more than usual. Atypical is still real depression." [6]
Treatment difference. "We match intensity to how severe and risky the illness is. If someone stops eating or is extremely unsafe, we may discuss ECT early because evidence shows it works well in severe depression. For reverse vegetative patterns we still usually start standard antidepressants and talking therapies; older MAOI medicines are specialist options with diet and interaction rules if other treatments fail." [1][2][3][5]
Safety. If death wishes, plans, or inability to eat return, contact the team/crisis services the same day. Provide written information; teach-back close. [4]
References
- [1]Liebowitz MR, et al. Antidepressant specificity in atypical depression Arch Gen Psychiatry, 1988.PMID 3276282
- [2]Jarrett RB, et al. Treatment of atypical depression with cognitive therapy or phenelzine: a double-blind, placebo-controlled trial Arch Gen Psychiatry, 1999.PMID 10232298
- [3]UK ECT Review Group Efficacy and safety of electroconvulsive therapy in depressive disorders: a systematic review and meta-analysis Lancet, 2003.PMID 12642045
- [4]Malhi GS, et al. The 2020 Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for mood disorders Aust N Z J Psychiatry, 2021.PMID 33353391
- [5]Van den Eynde V, et al. The prescriber's guide to classic MAO inhibitors (phenelzine, tranylcypromine, isocarboxazid) for treatment-resistant depression CNS Spectr, 2023.PMID 35837681
- [6]Stewart JW Treating depression with atypical features J Clin Psychiatry, 2007.PMID 17348764