In WHO classification, there were 7 cases of type A, 16 cases of type AB, 33 cases of type B1, 24 cases of type B2, 10 cases of type B3 and 5 cases of type C.

• 按WHO胸腺瘤分类方法分为(1) A型7例，(2) AB型16例，(3)B1型33例，(4) B2型24例，(5) B3型10例，(5) C型5例。