SEER Inquiry System - View

Question: 20130190 Status
Final

References
Source 1:   WHO Class Thymus Tumors
pgs:   164
Notes:   2004
Source 2:  
pgs:  
Notes:  


Question
Reportability: Is a thymoma, type B3 malignant and, therefore, reportable? See Discussion.

Discussion
Recent information received from a registrar/pathologist states the WHO classifies well-differentiated thymic carcinoma [8585/3] as a synonym for type B3 thymoma.

Answer
Thymoma, type B3 [8585/1] is not reportable. Well-differentiated thymic carcinoma [8585/3] is reportable.

WHO lists well-differentiated thymic carcinoma as a synonym for type B3 thymoma, but indicates the behavior code differs as indicated above.

History
Type B3 thymoma (8585/1) is not reportable. Well-differentiated thymic carcinoma (8585/3) is reportable.

WHO lists well-differentiated thymic carcinoma as a synonym for type B3 thymoma, but shows two different ICD-O-3 codes as indicated above.



Last Updated
06/24/2014

Date Finalized
02/05/2014