Overview
Congenital pulmonary alveolar capillary dysplasia (ACD) is a rare, lethal congenital lung developmental disorder characterized by abnormal architecture of the alveolar capillary bed, leading to severe hypoxemia and respiratory failure 1.Diagnosis
Clinical Presentation: Neonatal respiratory distress, hypoxemia 1.
Imaging: High-resolution CT showing characteristic mosaic perfusion and vascular abnormalities 1.
Pathology: Definitive diagnosis often made post-mortem; histopathological examination reveals abnormal alveolar capillary structures 1.
Genetic Testing: Exclusionary karyotyping or genetic testing to rule out other congenital anomalies mimicking ACD 1.Management
Supportive Care: Mechanical ventilation, oxygen therapy, and extracorporeal membrane oxygenation (ECMO) for acute respiratory failure 1.
No Curative Treatment: Currently no definitive medical or surgical treatment available 1.
Palliative Measures: Focus on symptom management and quality of life support 1.Special Populations
Pregnancy: Antenatal detection possible with imaging anomalies mimicking other syndromes like trisomy 21; karyotyping essential for differential diagnosis 1.
Pediatrics: Early recognition crucial due to rapid progression and high mortality in neonates 1.Key Recommendations
Perform detailed imaging and genetic testing to differentiate ACD from other congenital anomalies, especially in cases with antenatal findings suggestive of syndromes like trisomy 21 (Evidence: Moderate 1).
Utilize mechanical ventilation and ECMO as supportive measures for acute respiratory failure in neonates with suspected ACD (Evidence: Expert opinion 1).
Focus on palliative care strategies to manage symptoms and improve quality of life given the lack of curative treatments (Evidence: Expert opinion 1).References
1 McGaughran J, Souter DJ, Kuschel CA. Alveolar capillary dysplasia with antenatal anomalies mimicking trisomy 21. Journal of paediatrics and child health 2001. link