Pyriform Aperture Stenosis

  • Etiology: early fusion and hypertrophy of the medial nasal processes
  • Imaging: narrowing of the pyriform aperture
  • CT: should be performed parallel to anterior hard palate – or if gantry tilt is not possible reformat the axial images to the plane of the anterior hard palate
  • Clinical: associated with holoprosencephaly

Cases of Pyriform Aperture Stenosis