Introduction
Dysphagia (difficulty swallowing) is a high-yield OSCE station because progressive dysphagia in an older adult is oesophageal carcinoma until proven otherwise. You must characterise the dysphagia systematically, identify the anatomical level, and confidently apply the 2-week wait referral criteria.
💎 Clinical Pearl
Ask the patient to point to where food sticks. This is surprisingly accurate for localising the level of obstruction. High in the throat = oropharyngeal; retrosternal = oesophageal.
Two Types of Dysphagia
🧠 Mnemonic
Mechanical vs Motility — SoliDS vs Both:
- Mechanical (structural): difficulty with solids first, then progresses to liquids as obstruction worsens. Suggests a physical narrowing: tumour, stricture, web.
- Motility (neuromuscular): difficulty with both solids AND liquids from the outset. The propulsive mechanism is impaired regardless of food consistency. Suggests achalasia, systemic sclerosis, or neurological cause.
Key Discriminating Questions
1. Onset and Progression
| Pattern | Suggests |
|---|---|
| Rapidly progressive solids then liquids over weeks | Oesophageal carcinoma |
| Slowly progressive over months to years | Peptic stricture (GORD), achalasia |
| Intermittent, no progression | Oesophageal spasm, pharyngeal pouch, food bolus impaction |
| Sudden onset | Foreign body, food bolus, acute stroke |
2. Level of Dysphagia
| Patient-reported level | Suggests |
|---|---|
| High: throat, immediately on swallowing | Oropharyngeal dysphagia (neuromuscular, head and neck tumour) |
| Mid or retrosternal | Oesophageal dysphagia |
| Regurgitation of undigested food hours after eating | Pharyngeal pouch (Zenker's diverticulum) |
3. Solids, Liquids, or Both?
- Solids only initially = mechanical obstruction (start simple)
- Both from the start = motility disorder
- Liquids worse than solids = oropharyngeal neuromuscular (coughing on liquids = aspiration risk)
Differential Diagnosis
Mechanical (Structural)
| Diagnosis | Key features |
|---|---|
| Oesophageal carcinoma | Progressive dysphagia solids then liquids, weight loss, age over 55, smoking, alcohol |
| Peptic stricture | GORD history, heartburn, intermittent, slower progression |
| Pharyngeal pouch (Zenker's) | Elderly, regurgitation of undigested food, gurgling in neck, halitosis |
| Head and neck cancer | Hoarse voice, neck mass, lymphadenopathy, smoking and alcohol |
| Extrinsic compression | Thyroid enlargement, mediastinal mass, aortic aneurysm |
| Oesophageal web / Plummer-Vinson | Young anaemic women, iron deficiency, post-cricoid web |
Motility (Neuromuscular)
| Diagnosis | Key features |
|---|---|
| Achalasia | Young adults, solids and liquids equally, regurgitation, chest pain, no weight loss initially |
| Systemic sclerosis | Raynaud's, tight skin, CREST syndrome |
| Neurological: stroke, MND, myasthenia gravis | Associated neurological features, bulbar symptoms |
| Oesophageal spasm | Intermittent, severe chest pain, triggered by hot or cold food |
Associated Symptoms
- Weight loss: strongest red flag for malignancy
- Odynophagia (pain on swallowing): suggests oesophageal ulceration, candida, or carcinoma
- Heartburn: peptic stricture from GORD
- Hoarse voice: recurrent laryngeal nerve involvement (oesophageal or lung cancer)
- Coughing on swallowing: aspiration — oropharyngeal cause
- Regurgitation: achalasia, pharyngeal pouch
- Chest pain: oesophageal spasm
Red Flags — 2-Week Wait Criteria
⚠️ Red Flag
Refer urgently (2-week wait) for upper GI endoscopy if:
- Dysphagia of any duration in adults
- Any patient over 55 with weight loss plus dysphagia
- Any patient with odynophagia plus weight loss
- Any patient with progressive dysphagia
Dysphagia is an automatic 2-week wait trigger — do not wait for test results before referring.
Risk Factors for Oesophageal Carcinoma
| Type | Risk factors |
|---|---|
| Squamous cell carcinoma (mid-oesophagus) | Smoking, alcohol, achalasia, hot drinks, nutritional deficiency |
| Adenocarcinoma (lower oesophagus / GOJ) | GORD, Barrett's oesophagus, obesity, male sex, smoking |
"How do you differentiate mechanical from motility dysphagia?"
Mechanical dysphagia starts with solids and progresses to liquids as the obstructing lesion worsens. The patient can usually swallow liquids early on. Motility dysphagia affects solids and liquids equally from the outset because the propulsive mechanism is impaired regardless of food consistency. Asking whether liquids are affected from the start, and whether the dysphagia is progressive or intermittent, helps distinguish the two.
"What are the red flag features of dysphagia and what do they warrant?"
Any dysphagia is an automatic 2-week wait referral for upper GI endoscopy. Additional red flags include: rapid progression (solids to liquids over weeks), associated weight loss, odynophagia, age over 55, smoking and alcohol history, and hoarse voice. These features raise the probability of oesophageal carcinoma significantly.
"What is achalasia and how does it present?"
Achalasia is failure of the lower oesophageal sphincter to relax, combined with absence of oesophageal peristalsis. It presents in young adults (or elderly) with dysphagia to both solids and liquids equally, regurgitation of undigested food (especially when lying flat), nocturnal cough, chest discomfort, and gradual weight loss. Unlike carcinoma, it tends to be slowly progressive over years and is not associated with smoking or alcohol.
"What is Plummer-Vinson syndrome?"
Plummer-Vinson syndrome (also called Patterson-Brown-Kelly syndrome) is a triad of iron deficiency anaemia, dysphagia, and post-cricoid oesophageal web. It typically affects middle-aged women and presents with high dysphagia (immediately on swallowing solids). It is associated with an increased risk of post-cricoid carcinoma. Treatment of the iron deficiency often resolves the web.
Related guides: How to Take an Abdominal History OSCE | Jaundice History OSCE | Anaemia History OSCE