SEER Inquiry System - View

Question: 20170046 Status
Final

References
Source 1:   2007 MP/H Rules
pgs:  
Notes:   Benign Brain and CNS Tumors
Source 2:   ICD-O-3
pgs:  
Notes:  


Question

MP/H Rules/Histology--Brain and CNS: What is the histology code for a patient with a pathology report Final Diagnosis indicating, mucin-rich neuroepithelial neoplasm, favor low-grade? See Discussion.



Discussion

The pathologist noted this was a challenging brain neoplasm that did not easily fit into a specific WHO diagnostic classification. Multiple differential diagnoses were given including pilomyxoid astrocytoma, ganglioglioma and dysembryoplastic neuroepithelial tumor (DNET), but there were no definitive features characteristic of any of these tumors. In the Comment section following the Final Diagnosis, it further states: "In summary, the tumor appears to be a difficult to classify non-infiltrating glial/glioneuronal neoplasm without definitive high-grade features."



Answer

Code as 9505/1, Ganglioglioma, NOS.  The Multiple Primaries/Histology Rules for Benign and Borderline Intracranial and CNS Tumors Chart 1 lists several histology codes for neuronal and mixed neuronal-glial tumors.  Ganglioglioma, formerly Glioneuroma that is now obstolete in ICD-O-3, is the most applicable in this situation.



History


Last Updated
07/14/2017

Date Finalized
08/16/2017