thymoma type B3 https://www.malacards.org/card/epithelial_malignant_thymoma GARD:0024417 EFO:1000583 squamoid thymoma DOID:7926 thymoma type B3 epithelial malignant thymoma MONDO:0006458 Also known as well-differentiated thymic carcinoma, atypical thymoma, or epithelial thymoma, this type of thymoma displays morphologic characteristics of a well-differentiated carcinoma. The majority of cases occur in the anterior mediastinum as Masaoka stage II or stage III tumors. It is almost always invasive, it recurs frequently, and metastasizes in approximately 20% of the cases. NCIT:C7997 well differentiated thymic carcinoma epithelial thymoma atypical thymoma malignant thymoma type B3 well-differentiated thymic carcinoma ICDO:8585/1 UMLS:C0279705 ICDO:8585/3 MEDGEN:124648 thymoma type B