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Pulmonary disease in children with acquired immune deficiency syndrome and AIDS-related complex
Insights
This study differentiates two main lung diseases in children with AIDS: Pneumocystis pneumonia and pulmonary lymphoid hyperplasia. Recognizing distinct clinical and lab findings may avoid invasive lung biopsies for diagnosis.
Area of Science:
- Pediatric Pulmonology
- Infectious Diseases
- Immunology
Background:
- Children with acquired immune deficiency syndrome (AIDS) often develop pulmonary complications.
- Accurate diagnosis of these lung diseases is crucial for appropriate management.
- Lung biopsies are invasive and may not always be necessary.
Purpose of the Study:
- To define and differentiate two major pulmonary diseases in children with AIDS.
- To identify clinical and laboratory features distinguishing Pneumocystis carinii pneumonia (PCP) from pulmonary lymphoid hyperplasia (PLH).
- To assess the potential for non-invasive diagnosis.
Main Methods:
- Analysis of lung biopsies from 15 children with AIDS or AIDS-related complex.
- Clinical evaluation including age, symptoms, and physical examination findings.
- Laboratory tests including serologic assays and serum lactate dehydrogenase (LDH) levels.
- Histopathological examination of lung tissue.
Main Results:
- Pneumocystis carinii pneumonia (PCP) was diagnosed in 8 children, characterized by severe hypoxemia and elevated alveolar-arterial oxygen gradients.
- Pulmonary lymphoid hyperplasia (PLH) was found in 6 children, associated with older age, digital clubbing, parotid gland enlargement, and elevated IgG.
- Evidence suggested persistent Epstein-Barr virus infection in children with PLH.
Conclusions:
- Pneumocystis carinii pneumonia and pulmonary lymphoid hyperplasia are distinct pulmonary conditions in pediatric AIDS.
- Clinical and laboratory findings, including Epstein-Barr virus association, can help differentiate PLH from PCP.
- Non-invasive diagnostic approaches may be feasible, potentially avoiding surgical lung biopsies.
Abstract:
Two major pulmonary diseases were defined on the basis of lung biopsies in 15 children with acquired immune deficiency syndrome (AIDS) or AIDS-related complex. Pneumocystis carinii pneumonia was observed in eight children, and pulmonary lymphoid hyperplasia in six. One child had nonspecific interstitial pneumonitis. Children with P. carinii pneumonia had more severe hypoxemia, with higher alveolar-arterial oxygen gradients, and higher isomorphic elevations of serum lactate dehydrogenase. Clinically, children with pulmonary lymphoid hyperplasia were older, and had digital clubbing, parotid gland enlargement, and elevated serum IgG levels. Results of serologic assays and lung tissue analysis were suggestive of persistent Epstein-Barr virus infection exclusively in patients with pulmonary lymphoid hyperplasia. Recognition of the clinical and laboratory findings characteristic of each entity may assist in the differential diagnosis without the need of surgical biopsy.