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Fetal laryngeal obstruction: sonographic detection
K K Choong1, B Trudinger, C Chow
1Department of Nuclear Medicine and Ultrasound, Westmead Hospital, Westmead, New South Wales, Australia.
Summary
A stillborn infant presented with lung abnormalities and fluid buildup. Autopsy revealed a laryngeal obstruction, not initially diagnosed despite fetal lung biopsy findings.
Area of Science:
- Perinatology
- Fetal Pathology
- Medical Imaging
Background:
- Fetal lung hyperechogenicity and ascites can indicate various congenital anomalies.
- Cystic adenomatoid malformation of the lung (CCAM) is a common congenital lung malformation.
Purpose of the Study:
- To describe a case of fetal lung hyperechogenicity and ascites.
- To highlight the importance of considering laryngeal obstruction in fetal diagnosis.
- To present the distinctive ultrasonographic appearance of this condition.
Main Methods:
- Case report involving a patient at 21 weeks' gestation.
- Diagnostic procedures included amniocentesis and fetal lung biopsy.
- Autopsy of the stillborn infant.
Main Results:
- Amniocentesis results were normal.
- Fetal lung biopsy supported a diagnosis of cystic adenomatoid malformation of the lungs.
- Autopsy revealed a cartilaginous bar causing complete laryngeal obstruction.
Conclusions:
- Laryngeal obstruction can mimic or coexist with fetal lung abnormalities.
- Ultrasonographic findings should be interpreted in the context of potential airway compromise.
- Accurate prenatal diagnosis is crucial for managing fetal conditions.