SEER Inquiry System - View

Question: 20140001 Status
Final

References
Source 1:   2014 grade instructions
pgs:  
Notes:  
Source 2:  
pgs:  
Notes:  


Question
Grade--Brain and CNS: How should grade be coded for a pineal parenchymal tumor of “intermediate differentiation”? See discussion.

Discussion
Per a web search, the term “pineal parenchymal tumor of intermediate differentiation” refers to a pineal tumor with the histology/behavior that falls somewhere between the category of pineocytoma (9361/1) and pineoblastoma (9362/3). In other words, it is a malignant tumor that is a WHO grade II/III neoplasm because it's histologic features and behavior are not quite equivalent to a pineoblastoma (WHO grade IV). Thus, it appears the expression "intermediate differentiation" is actually referring to a type of WHO classification system rather than the grade field.

Should the type of documentation provided in pathology report be used to imply the grade field is being referenced and thus be coded to 2 for "intermediate differentiation" or should grade be coded to 9 based on the information found during the web search?

Answer
Code the grade as 2 based on instruction #8 in the revised grade instructions for 2014.

Do not use WHO grade to code the grade field for CNS tumors.

History


Last Updated
01/10/2014

Date Finalized
02/05/2014