Successful visualisation of foetal tracheo-oesophageal fistula in oesophageal atresia with prenatal ultrasonography.

This is the first report describing successful visualisation of a tracheo-oesophageal fistula (TEF) based on fluid flow on prenatal foetal ultrasonography. At 36 weeks of gestation, an anechoic tubular structure with a strong blue-coloured stream of fluid flow was observed extending from the trachea towards the gastric bubble on prenatal ultrasonography. TEF can be visualised prenatally under certain conditions.