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Start free with EleplanIsolated congenital nasal pyriform aperture stenosis
ORPHA:162516Malformation syndrome
Also called Isolated apertura pyriformis stenosis · Isolated nasal pyriform aperture hypoplasia
What it is
A rare otorhinolaryngological malformation characterized by narrowing of the pyriform aperture (i. e. < 8 to 10 mm in a full-term infant) due to an overgrowth of the nasal process of the maxilla, resulting in potentially lethal nasal airway obstruction in the newborn. Depending on the degree of obstruction, clinical signs and symptoms include inspiratory stridor, respiratory distress, cyanosis, sternal retraction, ribcage asymmetry, and feeding difficulties.
Key facts
- Age of onset
- Neonatal
- Classified as
- Malformation syndrome
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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