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Start free with EleplanParamedian nasal cleft
ORPHA:141242Morphological anomaly
Also called Alar cleft · Alar rim cleft · Cleft nose · Isolated cleft of the ala nasi · Isolated coloboma of the nose · Tessier number 1 cleft
What it is
Paramedian nasal cleft is a rare developmental defect during embryogenesis characterized by a unilateral or bilateral coloboma of the nose, ranging in severity from a small notch, resulting in minor deviation of the nasal septum, to variable-sized clefts of the nasal ala which may be associated with small cysts or sinuses in the nasal midline. Defect may be isolated or may occur in association with cleft lip and/or other craniofacial anomalies (e.g. hypertelorism, broadening of nasal root, midline cleft). Dorsum and apex of nose are usually well preserved.
Key facts
- Age of onset
- Antenatal, Neonatal
- Classified as
- Morphological anomaly
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.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
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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