Double track sign (pyloric stenosis)
Pyloric
stenosis • Hypertrophic pyloric stenosis - Ganzer Fall bei Radiopaedia
The double track sign is a radiological sign described in pyloric stenosis on various imaging modalities.
Barium study
Double streaks of barium passing through the narrow pylorus .
Ultrasound
On fluid aided real-time examination, the pyloric fluid is compressed into smaller tracks as it is impinged upon circumferentially by the thickened circular muscle .
Double track sign can also be seen in cases of pylorospasm diagnosed by sonography, therefore it is not pathognomonic for hypertrophic pyloric stenosis .
