What is the most likely diagnosis?
- 34 year-old immunocompromised male

Frontal and Lateral Radiographs of the Chest
- Mitral Stenosis
- Eosinophilic Granuloma
- Pneumocystis Pneumonia
- Emphysema
- Multiple AVMs
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Answer:
3. Pneumocystis Pneumonia
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Pneumocystis Pneumonia
General Considerations
- Most common cause of interstitial pneumonia in immunocompromised patients
- Organism
- Protozoan / fungus Pneumocystis carinii (jiroveci)