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SEER Inquiry System - Report
Produced: 02/07/2026 4:29 AM
Question 20081005
Inquiry Details
References:
#1: ICD-O-3
#2: WHO Class CNS Tumors, 103. 2007
Question:
Histology/Behavior--Brain and CNS: How are these fields coded for an "anaplastic glioneuronal neoplasm with spongioblastic architecture"? See Discussion.
Discussion:
Scenario: Addendum from Mayo Clinic review, IHC and consultation made dx of "anaplastic glioneuronal neoplasm with spongioblastic architecture". The original micro states 'high grade glial neoplasm w/o characteristic features of glioblastoma multiforme in that it lacks areas of significant necrosis, no nuclear palisading nor endothelial vascular proliferation...."
Answer:
The best code available according to our pathologist consultant is 9505/3 [Ganglioglioma, anaplastic]. According to our consultant, while ganglioglioma is traditionally a benign tumor, anaplastic ganglioglioma is classified as malignant by WHO (page 103), and comes as close to fitting the description of this tumor as any other term.
