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Agenesis of the lung. Report of four patients with unusual anomalies
Insights
Pulmonary agenesis, a rare congenital condition, often presents in infancy with symptoms that may improve over time. Parental consanguinity suggests a potential autosomal recessive inheritance pattern for this condition.
Area of Science:
- Pediatric Pulmonology
- Congenital Malformations
- Medical Genetics
Background:
- Pulmonary agenesis is a rare congenital anomaly characterized by the absence or incomplete development of lung tissue.
- Affected infants often present with respiratory distress and may have associated cardiac and skeletal abnormalities.
- The genetic basis and inheritance patterns of pulmonary agenesis are not fully understood.
Purpose of the Study:
- To describe the clinical presentation, diagnostic findings, and outcomes of four patients with pulmonary agenesis.
- To investigate potential associated anomalies and genetic factors, including parental consanguinity.
- To emphasize the importance of advanced imaging and diagnostic procedures in managing pulmonary agenesis.
Main Methods:
- Case series review of four patients diagnosed with pulmonary agenesis.
- Clinical data collection including symptoms, physical examination, and developmental follow-up.
- Diagnostic procedures included cardiac catheterization and angiography to delineate anatomical defects.
Main Results:
- All four patients exhibited symptoms in infancy, with three showing improvement over a 2-6 year follow-up period.
- One patient with complex anomalies, including lobar agenesis and anomalous venous drainage, died at one month.
- Thumb abnormalities were present in three patients, and parental consanguinity was noted in all four, suggesting autosomal recessive inheritance.
Conclusions:
- Pulmonary agenesis can present with diverse clinical manifestations and associated anomalies.
- Early diagnosis and comprehensive evaluation using cardiac catheterization and angiography are crucial for effective management.
- The presence of parental consanguinity in all cases warrants further investigation into the genetic underpinnings of pulmonary agenesis.
Abstract:
Four patients had pulmonary agenesis. All were symptomatic in infancy. In three, symptoms improved during two to six years of follow-up. One, who died at one month, had a unique combination of agenesis of the right upper and middle lobes and a hypoplastic right lower lobe supplied by systemic arteries from below the diaphragm, total anomalous pulmonary venous drainage to the left superior vena cava, tricuspid regurgitation with severe right atrial dilatation, patent ductus arteriosus, and reduplication of the right thumb. Abnormalities of the thumb were encountered in three patients. Parental consanguinity in all four patients suggests an autosomal recessive mode of inheritance. Cardiac catheterization and angiography are essential procedures for diagnosis and elucidation of the anatomic abnormalities and identification of associated cardiac defects.