Dysembryoplastic neuroepithelial tumor: an immunohistochemical study with myelin oligodendrocyte glycoprotein.
BACKGROUND
The dysembryoplastic neuroepithelial tumor (DNT) is an uncommon lesion characterized by a heterogeneous population of neurons, astrocytes, and oligodendroglia-like cells (OLCs). The basic nature of the DNT and its constituent cells, particularly the OLCs, remains unresolved; some authors favor a neuronal origin, and others propose a glial or mixed origin for these cells.


METHODS
We examined 11 DNTs with antibodies to myelin oligodendrocyte glycoprotein, a marker of mature oligodendrocytes.


RESULTS
All DNTs studied (7 from males, 4 from females; age range of patients, 2-37 years) were composed of varying proportions of neurons, astrocytes, and OLCs. Membrane or cytoplasmic immunoreactivity for myelin oligodendrocyte glycoprotein was found in many OLCs in 9 of 11 cases. The number of myelin oligodendrocyte glycoprotein-positive OLCs was variable: >75% of the OLCs were positive in 5 cases, 25% to 75% of the OLCs were positive in 2 cases, and <25% of the OLCs were positive in 2 cases.


CONCLUSIONS
These findings suggest that many of the OLCs represent mature oligodendrocytes and support the notion that DNTs are heterogenous lesions composed of multiple, mature cell types.
Gyure
K A
KA
Armed Forces Institute of Pathology, Washington, DC 20306, USA.
Sandberg
G D
GD
Prayson
R A
RA
Morrison
A L
AL
Armstrong
R C
RC
Wong
K
K
D000293:Adolescent; D000328:Adult; D001932:Brain Neoplasms / Q000378:metabolism* / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein / Q000378:metabolism*; D063308:Myelin-Oligodendrocyte Glycoprotein; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000378:metabolism* / Q000473:pathology; D009836:Oligodendroglia / Q000378:metabolism*
C571326:MOG protein, human; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein; D063308:Myelin-Oligodendrocyte Glycoprotein