Radiology quiz case 2. Pyriform sinus fistula.

@article{Tseng2012RadiologyQC,
  title={Radiology quiz case 2. Pyriform sinus fistula.},
  author={Wen-Hsuan Tseng and P P Lou},
  journal={Archives of otolaryngology--head & neck surgery},
  year={2012},
  volume={138 5},
  pages={519-20}
}