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COPD vs asthma vs pneumonia vs bronchiactisis vs Emphysema Clinical sign symptoms everything

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This comparison covers five overlapping respiratory conditions:
  1. Asthma
    Variable, usually reversible airway narrowing. Typical features: episodic wheeze, chest tightness, cough, and breathlessness, often worse at night, with exercise, allergens, cold air, or infections.
  2. COPD
    Persistent airflow limitation, most often related to smoking or biomass exposure. Symptoms are progressive exertional breathlessness, chronic cough, sputum, wheeze, and recurrent exacerbations. COPD includes chronic bronchitis and emphysema.
  3. Emphysema
    A structural form of COPD in which alveolar walls are destroyed, causing air trapping and loss of gas-exchange surface. Prominent progressive dyspnea, reduced breath sounds, hyperinflation, and sometimes weight loss are typical.
  4. Bronchiectasis
    Permanently dilated, damaged bronchi with poor mucus clearance. Hallmark: chronic daily productive cough with large-volume, often purulent sputum, repeated chest infections, hemoptysis, and crackles. CT confirms the diagnosis.
  5. Pneumonia
    Acute infection of lung tissue. Features often include fever, chills, acute cough with sputum, pleuritic chest pain, shortness of breath, focal crackles, and sometimes confusion in older adults. A chest X-ray may show consolidation.
Quick distinction: asthma is episodic and usually reversible; COPD/emphysema are chronic and progressive; bronchiectasis is defined by chronic infective sputum production and abnormal bronchi; pneumonia is an acute lung infection.
Which format do you want next?
  1. Detailed comparison table - symptoms, signs, investigations, X-ray/CT, treatment
  2. Exam notes - clinical features and differentiating points
  3. Clinical cases - how to distinguish them in a patient
  4. All five in depth - one condition at a time
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