Nasal glioma

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Subcutaneous firm paranasal mass since birth.

Patient Data

Age: 2 months
Gender: Female
mri

Well-defined extra-and intranasal mass. The extranasal component is located in the left aspect of the root of the nose, isointense to the normal brain on T1 and T2 with no restricted diffusion and heterogeneous enhancement (mainly peripheral) on postcontrast sequences. The intranasal component is located within the left nasal cavity in continuity with the extranasal component and displays a low signal on T1, high signal on T2 with no restricted diffusion and peripheral enhancement on postcontrast sequences. No connection was seen with the anterior cranial fossa.

Case Discussion

MRI features of a solid-cystic nasal mass with extranasal and intranasal components, with no connection with the intracranial structures, suggestive of nasal glioma (mixed form).

The patient underwent complete excision of the mass that was pathologically confirmed as nasal glioma.

Nasal gliomas, also known as nasal glial heterotopia, are a rare congenital non-neoplastic lesions composed of dysplastic glial cells which have lost their intracranial connections. They can be subdivided into extranasal (60%), intranasal (30%) and mixed forms (10%).

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