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SEER Inquiry System - Report
Produced: 11/05/2025 8:18 AM
Question 20091072
Inquiry Details
References:
WHO Class CNS Tumors, 115-116. 2007
Question:
Histology--Brain and CNS: How is histology coded for a "rosette-forming glioneuronal tumor" of the fourth ventricle?
Discussion:
Answer:
Assign histology code 9505/1 [Ganglioglioma, NOS].
Rosette-forming glioneuronal tumor of the 4th ventricle is a new WHO entity. There is no current ICD-O-3 code for this. The best code available at this time is 9505/1.
Cancer Site Category:
Brain and CNS
Data Item Category:
Histology
Other Category:
N/A
Year:
2009
