The double track sign is a radiological sign described in pyloric stenosis on various imaging modalities.
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.
- 1. AAP. Apls. Jones and Bartlett Publishers. (2007) ISBN:076374414X. Read it at Google Books - Find it at Amazon
- 2. Cohen HL, Schechter S, Mestel AL et-al. Ultrasonic "double track" sign in hypertrophic pyloric stenosis. J Ultrasound Med. 1987;6 (3): 139-43. J Ultrasound Med (abstract) - Pubmed citation
- 3. Cohen HL, Blumer SL, Zucconi WB. The sonographic double-track sign: not pathognomonic for hypertrophic pyloric stenosis; can be seen in pylorospasm. J Ultrasound Med. 2004;23 (5): 641-6. J Ultrasound Med (full text) - Pubmed citation