Counselling · Intermediate · Endocrinology

Sore Throat in a Patient with Hyperthyroidism

Practise this PLAB 2 counselling station on Viral Pharyngitis. 8-minute voice AI simulation with feedback on all 3 marking domains.

Clinical scenario

You are an FY2 doctor in a primary care clinic. Therese Wallace, a 45-year-old woman on carbimazole for Graves' disease, presents with a sore throat. Please take a focused history and counsel her on the serious risk of agranulocytosis, the need for urgent blood tests, and when to seek emergency care.

Background notes: PMH: Graves' disease

What this station tests

  • Recognising carbimazole plus sore throat as a potential agranulocytosis emergency: the connection between the medication and the symptom must be immediate
  • Arranging same-day FBC regardless of clinical impression: agranulocytosis cannot be excluded clinically, only by blood count
  • Teaching the ongoing carbimazole safety rule: any sore throat, fever, or mouth ulcers requires same-day FBC for the duration of treatment
  • Not being falsely reassured by a benign presentation: agranulocytosis can start subtly
  • Clear safety netting: A&E if high fever or unable to swallow, with specific instruction to tell staff about carbimazole

How to use your 8 minutes

  • 0-1 min — Introduction: Introduce yourself, establish what patient already knows and understands.
  • 1-3 min — Explain Condition: Explain diagnosis or condition using chunk-and-check technique. Use simple language, avoid jargon.
  • 3-5 min — Management Options: Discuss treatment options. Shared decision-making. Risks, benefits, alternatives.
  • 5-7 min — Address Concerns: Explore and address specific concerns. Check understanding. Discuss lifestyle implications.
  • 7-8 min — Closing: Summarise agreed plan. Safety netting. Arrange follow-up. Written information offer.

Consultation approach

The opening

A sore throat in a patient on carbimazole is agranulocytosis until proven otherwise. The candidate must recognise this as a potential emergency, arrange urgent bloods, and counsel on the risk even if the presentation seems benign. Mrs Wallace is 45, on carbimazole for Graves' disease for 6 weeks, presenting with a 2-day sore throat. She vaguely remembers being warned about something related to white blood cells. Open with: 'Mrs Wallace, you mentioned you are on carbimazole. Can you tell me about the sore throat and how you are feeling generally?' Immediately connect the sore throat to the medication in your mind.

Core approach

Assess for agranulocytosis red flags. Fever: she checked her temperature this morning at 36.8 (normal). No severe sore throat (mild to moderate). No difficulty swallowing. No oral ulceration. No rash, bruising, or bleeding. No significant malaise beyond feeling slightly tired. Her colleague had a cold last week, making viral transmission likely. This presentation is more consistent with viral pharyngitis than agranulocytosis.

However, the candidate must not be falsely reassured by a seemingly benign presentation. Agranulocytosis can present subtly and progress rapidly. The only way to exclude it is an urgent FBC with differential white cell count. This must be arranged today, regardless of how viral the presentation appears. If neutrophils are normal, she can be reassured. If neutrophils are low, carbimazole must be stopped immediately and she needs urgent haematology input.

Counsel on the ongoing risk. 'Mrs Wallace, you were right to come in. Any sore throat or fever while on carbimazole needs urgent investigation because, very rarely, the medication can cause a dangerous drop in white blood cells that fight infection. This is called agranulocytosis and it occurs in less than 1 in 200 people, but it can be serious if not caught early.' This is the teaching moment: she needs to know the rule for the entire time she is on carbimazole.

Closing and safety netting

Immediate plan: urgent FBC with differential today. If normal neutrophils: viral pharyngitis, self-care advice (paracetamol, fluids, rest), continue carbimazole. If low neutrophils: stop carbimazole immediately, urgent hospital assessment. She must not take tonight's carbimazole dose until bloods are back if results are delayed.

Ongoing rule: 'For as long as you are on carbimazole, if you develop a sore throat, high fever, mouth ulcers, or feel unexpectedly unwell, you must have an urgent blood test the same day. Do not wait to see if it passes.' This is the safety rule that must be reinforced at every opportunity.

Safety net: 'If you develop a high fever, feel significantly worse, or cannot swallow, go to A&E immediately and tell them you are on carbimazole.' Follow-up: call with FBC result today.

How examiners mark this station

Examiners will assess your ability to explain viral pharyngitis and its management in a patient-centred way. Domain 2 (Clinical Management) and Domain 3 (Interpersonal Skills) are equally weighted and primary. Expect marks for accurate information delivery, shared decision-making, chunk-and-check technique, and addressing the patient's specific concerns. Domain 1 (Data Gathering) is assessed through how well you establish the patient's baseline understanding and elicit their concerns.

Domain 1: Data Gathering, Technical and Assessment Skills (Primary focus)

Scores well: Immediate connection between carbimazole and sore throat. Red flag screening (fever, oral ulcers, bruising, bleeding). Viral contact history noted. Temperature checked. Duration of carbimazole treatment established (6 weeks, within highest risk period).

Costs marks: Not connecting carbimazole to sore throat. Not screening for red flags. Not checking temperature.

Domain 2: Clinical Management Skills (Primary focus)

Scores well: Same-day FBC arranged regardless of clinical impression. Clear management pathway: normal neutrophils = continue, low neutrophils = stop and refer. Ongoing safety rule taught. Appropriate safety netting for deterioration.

Costs marks: Not arranging FBC. Reassuring without bloods. Not teaching the ongoing rule. No safety netting.

Domain 3: Interpersonal Skills (Throughout)

Scores well: Validating her decision to come in. Explaining agranulocytosis risk proportionately (rare but serious). Not causing unnecessary alarm while ensuring she understands the importance. Practical, memorable safety rule.

Costs marks: Dismissing her concern. Either over-alarming or under-representing the risk. Not providing a clear rule to follow.

Common examiner feedback (and how to fix it)

Did not provide adequate explanation or plan to the patient

Fix: Use chunk-and-check: deliver one concept, check understanding, then move to the next. Offer all relevant treatment options with risks and benefits before helping the patient decide.

Did not sufficiently recognise or respond to the patient's feelings, concerns, or expectations

Fix: Before and during counselling, explicitly ask what concerns the patient most. Respond to emotional cues with empathic statements before continuing with information.

Common mistakes in this station

  1. Not connecting the sore throat to carbimazole. A sore throat is common. A sore throat on carbimazole is a potential emergency. Candidates who take a standard URTI history without checking the drug history miss this critical connection.
  2. Deciding the presentation is viral and not checking bloods. Even if the clinical picture suggests viral pharyngitis (no fever, mild symptoms, known contact), agranulocytosis can only be excluded by FBC. Candidates who reassure without bloods demonstrate dangerous practice.
  3. Not teaching the ongoing safety rule. This is not a one-off: she needs to know that any sore throat on carbimazole requires same-day blood test for the entire duration of treatment. Candidates who manage this episode without establishing the rule miss the prevention opportunity.

Resitting PLAB 2?

If counselling stations have been a challenge, the most common issue is information overload: delivering too much clinical detail without checking understanding. Practise the chunk-and-check technique until it becomes automatic. Remember that shared decision-making, not lecturing, is what scores highly in Domain 3.

Example opening

Hello, my name is Dr [Name]. I understand you've come in today to discuss [topic]. Before I explain things, could you tell me what you've been told so far, so I know where to start?

Frequently asked questions

How do I open and run a viral pharyngitis counselling station in PLAB 2?

A sore throat in a patient on carbimazole is agranulocytosis until proven otherwise. The candidate must recognise this as a potential emergency, arrange urgent bloods, and counsel on the risk even if the presentation seems benign.

What does a strong performance look like to the examiner in this station?

Strong performances show: Immediate connection between carbimazole and sore throat. Red flag screening (fever, oral ulcers, bruising, bleeding). Viral contact history noted. Weak performances: Not connecting carbimazole to sore throat. Not screening for red flags. Not checking temperature.

What is the biggest pitfall in this viral pharyngitis station?

Not connecting the sore throat to carbimazole. A sore throat is common. A sore throat on carbimazole is a potential emergency.

How should I prepare for viral pharyngitis if I have never seen it in practice?

Structure beats experience here. Focus on arranging same-day FBC regardless of clinical impression: agranulocytosis cannot be excluded clinically, only by blood count. The written guidance on this page covers the full approach, and practising the consultation aloud builds the fluency the examiner is listening for.

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