Double track sign (pyloric stenosis)

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 1.


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 2.

Double track sign can also be seen in cases of pylorospasm diagnosed by sonography, therefore it is not pathognomonic for hypertrophic pyloric stenosis 3.

Article information

rID: 22049
Section: Signs
Tag: cases, stub
Synonyms or Alternate Spellings:
  • The double track sign
  • Double track sign in barium study
  • Double track sign in ultrasonography
  • The double track sign of pyloric stenosis
  • Double-track sign

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Cases and figures

  •  Case 1
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