"Nasal gliomas occur near the root of the nose (where the cranial portion of the nose joins the forehead). Extra-nasal gliomas are usually seen in a paramedian location at the bridge of the nose external to the nasal passage, whereas intranasal lesions are usually located within the nasal passage medial to the middle turbinate bone."
"Extranasal gliomas clinically present in early infancy or childhood as a firm, red to bluish skin-covered mass along nasal dorsum (glabella). These masses will not exhibit pulsations or increase in size with the Valsalva manoeuvre or compression of the ipsilateral jugular vein (Furstenberg sign). They are typically slow growing; however, they may grow more or less rapidly than the adjacent soft tissue."
"Nasal gliomas are composed of dysplastic glial tissue and are congenital non-neoplastic lesions best categorised as heterotopia. They are rarely associated with other congenital malformations 2. A nasal glioma may be connected to the brain by a stalk of tissue in up to 15% of cases, but the stalk does not contain a direct fluid-filled tract that communicates with the subarachnoid spaces; therefore, a nasal glioma is distinct from a nasal encephalocele."
"Intranasal gliomas present as large, firm, submucosal masses that extend inferiorly, toward or near the nostril. They can cause:"