Sonography as a procedure complementary to alpha-fetoprotein testing for neural tube defects

Area of Science:

• Medical Imaging
• Prenatal Diagnostics
• Fetal Medicine

Background:

• Elevated alpha-fetoprotein (AFP) levels during amniocentesis can indicate potential fetal abnormalities.
• Previous ultrasound findings or a history of neural tube defects necessitate further investigation.
• Accurate prenatal diagnosis is vital for appropriate management and counseling.

Purpose of the Study:

• To evaluate the diagnostic accuracy of sonography in identifying fetal anomalies.
• To assess ultrasound's role as a complementary tool to maternal serum AFP screening.
• To determine the effectiveness of ultrasound in cases with elevated AFP or suspicious findings.

Main Methods:

• Sonographic examinations were performed on 44 fetuses with indications for further evaluation.
• Indications included elevated amniotic fluid AFP, questionable prior ultrasound findings, or a history of neural tube defects.
• Fetal outcomes were compared with sonographic findings.

Main Results:

• Sonography correctly identified 11 cases of neural tube defects.
• 16 cases of non-neural tube defect anomalies were accurately diagnosed.
• 17 fetuses were correctly identified as normal.
• Overall, ultrasound demonstrated high accuracy in differentiating affected from unaffected fetuses.

Conclusions:

• Sonography is a highly effective tool for diagnosing fetal anomalies, including neural tube defects.
• Ultrasound serves as an essential second diagnostic modality, enhancing the reliability of prenatal screening.
• The study confirms ultrasound's value in evaluating fetuses with elevated AFP or other risk factors.