Pyriform Aperture Stenosis

  • Etiology: early fusion and hypertrophy of the medial nasal processes
  • Imaging: narrowing of the pyriform aperture
  • CT: axial images should be reformatted to be parallel to the plane of the anterior hard palate
  • Clinical: associated with holoprosencephaly

Cases of Pyriform Aperture Stenosis

CT of pyriform aperture stenosis
Axial CT without contrast of the face shows narrowing of the pyriform apertures bilaterally.