Nasal dorsum fistula

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Nasal dorsum fistula

ORPHA:141219Morphological anomaly

What it is

A rare otorhinolaryngological malformation characterized by the presence of a dermoid cyst, located on the dorsum of the nose, which presents a fistula, often extending to the intracranial region. Patients present a firm, slow-growing mass, which contains skin and dermal elements (including hair follicles and sebaceous glands), that do not transilluminate or compress, and may be associated with intermittent or chronic discharge of sebaceous material, soft tissue and skeletal deformity, and local infection. Meningitis, convulsions and cerebral abscess may be observed if intracranial extension exists.

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

GARD 19963MONDO 0015410MONDO 15410UMLS C0339853

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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