Nasal Glial Heterotopia



Nasal Glial Heterotopia


Lester D. R. Thompson, MD










Low magnification shows intact skin with adnexal structures (hair follicles image) surrounding a haphazard collection of neural elements (glial tissue).






High magnification shows the intermingling of glial elements with fibrosis. This is a very subtle finding, highlighting the reason for performing special studies in many cases.


TERMINOLOGY


Abbreviations



  • Nasal glial heterotopia (NGH)


Synonyms



  • Glioma (implies tumor, and should be discouraged)


Definitions



  • NGH is congenital malformation of displaced normal, mature glial tissue (choristomas)



    • Continuity with intracranial component usually obliterated


  • Encephalocele represents herniation of brain tissue and leptomeninges through defect of skull



    • Continuity with cranial cavity is maintained


ETIOLOGY/PATHOGENESIS


Developmental Anomaly



  • NGH is congenital malformation of displaced normal and mature glial tissue

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Nasal Glial Heterotopia
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