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Published on: February 23, 2014
Pulmonary infection in the immunocompromised patient
1Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Abstract:
Pneumonia in the immunocompromised patient remains a significant cause of morbidity and mortality. These patients are susceptible to a wide variety of organisms, but specific infections tend to occur in well defined settings. The type of infection can be predicted based on the nature and severity of the immune defect, past patient exposures, chemotherapy given, radiographic presentation, and acuteness of illness. New treatments, including growth factors, the oral antifungal agents, and antiviral drugs, such as ganciclovir and acyclovir, have improved management and prognosis in some cases. However, some problems have increased with a significant risk of spontaneous pneumothorax now seen with Pneumocystis carinii infection. Bronchoscopy with bronchoalveolar lavage plays a major role in diagnosis, particularly for P carinii and cytomegalovirus infection. However, open lung biopsy remains essential for diagnosis in some settings. Surgical resection for control of hemoptysis and for removal of residual foci of disease also are an integral part of management of pulmonary fungal infections in the immunosuppressed patient.
Insights
Pneumonia in immunocompromised patients is serious, with infection type predictable by immune status and illness presentation. Advances offer improved outcomes, but new risks like pneumothorax with Pneumocystis pneumonia emerge.
Area of Science:
- Pulmonology
- Infectious Diseases
- Oncology
- Immunology
Background:
- Immunocompromised patients face significant morbidity and mortality from pneumonia.
- Susceptibility to diverse pathogens is high, with infection patterns linked to immune status and clinical context.
Purpose of the Study:
- To review the spectrum of pneumonia in immunocompromised patients.
- To discuss diagnostic modalities and therapeutic advances.
- To highlight emerging challenges in managing these infections.
Main Methods:
- Review of existing literature on pneumonia in immunocompromised hosts.
- Analysis of factors influencing pathogen prediction (immune defect, exposures, chemotherapy, radiography, illness acuity).
- Discussion of diagnostic tools including bronchoscopy with bronchoalveolar lavage and open lung biopsy.
- Evaluation of therapeutic strategies, including growth factors, oral antifungals, and antivirals (ganciclovir, acyclovir).
Main Results:
- Infection type is often predictable based on clinical and host factors.
- New treatments have improved prognosis in some cases.
- Emerging complications include spontaneous pneumothorax associated with Pneumocystis carinii infection.
Conclusions:
- Bronchoscopy with bronchoalveolar lavage is crucial for diagnosing infections like Pneumocystis carinii and cytomegalovirus.
- Open lung biopsy remains essential for diagnosis in select cases.
- Management involves a multidisciplinary approach, including surgical resection for fungal infections and hemoptysis.
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