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Is esthesioneuroblastoma a peripheral neuroectodermal tumor?
R S Nelson1, E J Perlman, F B Askin
1Department of Pathology, Johns Hopkins Hospital, Baltimore, MD 21287, USA.
Human Pathology
|June 1, 1995
Summary
Esthesioneuroblastoma (ENB) is a neural tumor, but this study found it does not express the MIC-2 protein, challenging its classification as a primitive neuroectodermal tumor (PNET). Further research into ENB
Area of Science:
- Neuro-oncology
- Surgical pathology
- Molecular diagnostics
Background:
- Esthesioneuroblastoma (ENB), also known as olfactory neuroblastoma, is a rare sinonasal malignancy.
- Its precise histogenesis remains unclear, with a broad histological spectrum.
- Previous studies suggested a link to primitive neuroectodermal tumors (PNET) due to shared chromosomal translocations.
Purpose of the Study:
- To investigate the histogenesis of Esthesioneuroblastoma (ENB).
- To determine if ENB shares the MIC-2 protein expression characteristic of PNET and Ewing's sarcoma (ES).
- To clarify the relationship between ENB and other primitive neuroectodermal tumors.
Main Methods:
- Immunohistochemical analysis of 18 ENB samples using the 12E7 antibody against MIC-2 protein.
- Evaluation of neural markers including neuron-specific enolase (NSE), synaptophysin (SYN), and chromogranin (CHR).
- Comparison of ENB marker expression with known PNET/ES profiles.
Main Results:
- None of the 18 ENB specimens expressed the MIC-2 protein (12E7 antibody).
- 16 ENB samples were positive for NSE, 9 for SYN, and 13 for CHR.
- These findings indicate ENB is a primitive neural tumor but not a member of the PNET family.
Conclusions:
- Esthesioneuroblastoma (ENB) is confirmed as a primitive neural tumor.
- The absence of MIC-2 expression differentiates ENB from PNET and Ewing's sarcoma.
- The study refutes the hypothesis that ENB is histogenetically related to PNET.