RESUMEN
PURPOSE: Our aims were to describe the feasibility of diagnosis of DAA in early pregnancy and to assess its prenatal prevalence, associated anomalies and outcome. MATERIALS AND METHODS: A retrospective cohort review of all DAA cases diagnosed by early prenatal transvaginal scans at 12-17 weeks of gestation between the years 2007-2018 was performed. Associated anomalies, genetic abnormalities and long-term postnatal outcome were evaluated. RESULTS: 12 cases of DAA were diagnosed by early prenatal transvaginal scans at a median of 15 (range: 12-17) weeks of gestation out of a total of 28â654 early scans preformed with a prevalence of at least 1:2378. Associated anomalies/genetic abnormalities were found in 5/12 (42â%) cases. The diagnosis was confirmed postnatally in all newborns. In two cases termination of pregnancy was performed. Four patients (40â%) were symptomatic. Six patients (60â%) underwent surgery due to symptoms or due to severe obstruction on imaging with resolution of symptoms in all except one patient. CONCLUSION: DAA can be readily diagnosed transvaginally even in the first trimester. Its prevalence is 1:2387. A search for associated anomalies and genetic abnormalities should be performed. If DAA is isolated, the prognosis with or without surgery is usually good.