[The fetal ultrasonography in the second quarter: interest for the pediatric surgeon].

Introduction: The paediatric surgeon should know the details of prenatal ultrasound diagnosis to participate in advising parents about the continuation of the pregnancy, and to plan the prenatal and postnatal treatment. Our objectives are: to determine the incidence of congenital anomalies detected with ultrasound in the 2nd trimester, the number of these diagnoses which is confirmed at birth and what is the usefulness of this test when advising parents.
Patients and Methods: We reviewed the prenatal ultrasound in 2nd trimester reports made from January 2005 to July 2009. We note the ultrasound findings, the maternal and gestational age. The evolution of anomalies of the fetuses and the number of spontaneous and volunteers abortions are noted. Finally, the diagnoses are checked in the newborns.
Results: 10,256 ultrasonographies are made in this period. 209 stories of pregnant women (2%), which present fetal pathology amenable to general surgical treatment, are accessible for study. These include: 182 urologic disorders (85.44%), 13 digestive disorders (6.1%), 6 thoracic disorders (2.8%), 6 multiple malformations (2.8%), 4 maxillofacial disorders (1.88%) a sacrococcygeal teratoma (0.47%), an umbilical cord cyst (0.47%), 7 pregnancies are spontaneous abortion and 7 are terminated voluntarily. 183 stories of newborns are reviewed, we can confirm 48 uropathies (26.37%), 4 digestive malformations (30.77%), 4 thoracic disorders (66.66%), 2 maxillofacial disorders (50%) and 1 teratoma.
Conclusions: Ultrasonography in the 2nd trimester detects almost 2% of specific fetal malformations. False positives are common in all diagnostic groups. The number of abortions and the terminations of pregnancy is low, most of them are polymalformated fetuses. We believe that ultrasonography in the 20th week have low value to counsel the termination of pregnancy, because only 7 of the 160 terminations indicated in our hospital during the study period, correspond to fetuses with pathology detected in the 2nd trimester. We recognize the usefulness of this test but, the false positive and favorable developments in a high percentage of fetuses, make us to be cautious to advise the continuation of pregnancy and the indication of treatment.