Congenital Diaphragmatic Hernias Workup
- Author: Daniel S Schwartz, MD, FACS; Chief Editor: Jeffrey C Milliken, MD more...
Laboratory Studies
- Maternal serum alpha-fetoprotein (AFP): Low levels have been associated with CDH. However, low AFP also is observed with trisomy 18 and trisomy 21, so a low AFP level alone is not diagnostic.
Imaging Studies
- Chest radiograph[11]
- Congenital (early diagnosis) - Bowel and stomach in the chest cavity, shifting of the mediastinum (usually to the right)
- See the image below.
Anteroposterior (AP) view of the chest in a patient with a congenital diaphragmatic hernia (CDH) shows herniation of bowel loops into the left hemithorax, with a shift of the heart and mediastinum to the right side. - Congenital (late diagnosis) - Suspicious mass incidentally found on chest radiograph
- Prenatal diagnosis of CDH: A level 3 ultrasound examination is the criterion standard for reaching a diagnosis of CDH in utero. Features indicative of CDH are polyhydramnios, an absent or intrathoracic stomach bubble, mediastinal and cardiac shift away from the side of herniation, and (rarely) fetal hydrops.
- MRI can be utilized to show a fetal lung volume and, in some instances, to help determine postnatal mortality.
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