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Pulmonary alveolar microlithiasis and probe-based confocal laser endomicroscopy
Jonas Yserbyt1, Touffic Alamé, Christophe Dooms
1Department of Clinical and Experimental Medicine, Respiratory Division, University Hospitals, University of Leuven, Belgium. jonas.yserbyt@uzleuven.be
Journal of Bronchology & Interventional Pulmonology
|April 24, 2013
Summary
Pulmonary alveolar microlithiasis (PAM) is a rare lung disease. This study highlights varied sibling presentations and introduces novel endoscopic findings using probe-based confocal laser endomicroscopy for diagnosing familial PAM.
Area of Science:
- Pulmonology
- Rare Diseases
- Medical Imaging
Background:
- Pulmonary alveolar microlithiasis (PAM) is a rare interstitial lung disease characterized by calcium-phosphate microlith accumulation in alveoli.
- Familial cases of PAM present with variable clinical severity and radiological distribution.
Observation:
- Two siblings with familial PAM exhibited distinct disease manifestations.
- Immune cytologic analysis of bronchoalveolar lavage (BAL) revealed CD4 alveolitis in the more affected sibling, but a normal BAL in the less affected one.
- Probe-based confocal laser endomicroscopy (pCLE) was utilized for the first time to visualize alveolar microliths.
Findings:
- Immune cytologic BAL analysis showed low specificity in diagnosing familial PAM.
- pCLE provided novel endoscopic visualization of alveolar microliths in PAM.
- Clinical presentation and radiological findings varied significantly between affected siblings.
Implications:
- This study expands the understanding of familial PAM's heterogeneous presentation.
- pCLE offers a potential new diagnostic tool for PAM, providing direct visualization of microliths.
- The findings underscore the limitations of BAL cytology in familial PAM diagnosis.
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