Nasal dermoid cyst

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Nasal dermoid cyst

ORPHA:141103Morphological anomaly

Also called Nasal dermoid sinus cyst

What it is

A rare otorhinolaryngological malformation characterized by a dermoid cyst along the nasal dorsum or glabella, lined by keratinized squamous epithelium and containing intraluminal keratin and mature adnexal structures, such as hair follicles, sebaceous and sweat glands. The majority of nasal dermoid cysts are superficial, rarely they extend intracranially. The cysts are typically benign but are susceptible to recurrent infections that may progress to osteomyelitis, meningitis or an intracranial abscess.

Key facts

Classified as
Morphological anomaly

ICD-10 codes

Q18.8filed under a broader ICD-10 category — shared with 11 other rare diseases

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

MONDO 0010921OMIM 600679UMLS C0339852

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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