Pneumonia differential diagnosis
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Priyamvada Singh, M.D. [2]
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Pneumonia Microchapters |
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Diagnosis |
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Treatment |
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Risk calculators and risk factors for Pneumonia differential diagnosis |
Differentiating Pneumonia from other Diseases
| Disease | Findings |
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| Acute bronchitis | No infiltrates on the CXR. |
| Asthma | Past medical history, no infiltrates on chest X Ray. |
| Bronchiolitis obliterans | Should be suspected in patients with pneumonia who do not respond to antibiotics treatment. |
| Congestive heart failure | Bilateral pulmonary edema, shortness of breath. |
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- COPD - No infiltrates on chest X Ray.
- Empyema - CXR showing features of pleural effusion, inflammatory markers on thoracocentesis.
- Endocarditis with septic pulmonary emboli
- Gastroesophageal reflux disease - Normal chest X Ray, symptoms worsening during night.
- Influenza
- Lung abscess - CXR showing signs of lung abscess.
- Malignancy - CT scan and biopsy are helpful in ruling out malignancy.
- Pertussis - Productive cough for weeks, nasopharyngeal aspirate aids in diagnosis.
- Pulmonary embolus - A high degree of suspicion should be kept for pulmonary embolus. Chest X Ray may be normal.
- Sinusitis - Sinus tenderness, post nasal drip.
- Upper respiratory tract infection
- Vasculitis - Systemic manifestations of collagen vascular disease may be seen.