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Question: 20130190 Status
Final

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


Question
Reportability--Is a thymoma, B3 type malignant? Recent information received from a registrar/pathologist states that the WHO classifies well-differentiated thymic carcinoma (8585/3) as a synonym for Type B3 thymoma.

Discussion


Answer
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.

History


Last Updated
10/22/2013

Date Finalized
02/05/2014