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Pneumocystis carinii pneumonia radiographically simulating tuberculosis
The American Review of Respiratory Disease
|November 1, 1985
Summary
Pneumocystis pneumonia can mimic tuberculosis in immunocompromised patients, often presenting with upper lobe infiltrates. Early diagnosis and treatment of Pneumocystis pneumonia are crucial for patient survival.
Area of Science:
- Pulmonology
- Infectious Diseases
- Radiology
Background:
- Pneumocystis pneumonia (PCP) is a serious opportunistic infection.
- Typical PCP presentations often involve diffuse or lower lobe infiltrates.
- Upper lobe infiltrates are not commonly associated with PCP.
Purpose of the Study:
- To describe a distinct radiographic pattern of PCP.
- To highlight the importance of considering PCP in immunocompromised patients with upper lobe infiltrates.
- To differentiate PCP from tuberculosis based on radiographic findings.
Main Methods:
- Retrospective review of eight immunocompromised patients.
- Radiographic analysis of lung infiltrates.
- Diagnostic confirmation via bronchoscopy and sputum cytology.
- Assessment of treatment response to anti-PCP therapy.
Main Results:
- Eight immunocompromised patients presented with upper lobe infiltrates mimicking tuberculosis.
- Five patients had bilateral lobar consolidation; three had apical/posterior segmental consolidation.
- Pneumocystis carinii was diagnosed in 7/8 patients via bronchoscopy (negative AFB stains) and in 1/8 via cytology.
- Seven patients responded to specific PCP therapy.
Conclusions:
- Upper lobe infiltrates can be a presentation of Pneumocystis pneumonia in immunocompromised individuals.
- This pattern should be considered in the differential diagnosis, especially when tuberculosis is suspected.
- Prompt diagnosis and treatment of PCP are vital for favorable outcomes.