B3型胸腺瘤异型性较明显，常染色质较丰富，核仁明显，细胞质宽大，有突起。
Type B2, B3 thymoma have obvious atypia with rich in euchromatin and distinct nucleolus in nuclei and broad cytoplasm with projections.
B3型胸腺瘤异型性较明显，常染色质较丰富，核仁明显，细胞质宽大，有突起。
Type B2, B3 thymoma have obvious atypia with rich in euchromatin and distinct nucleolus in nuclei and broad cytoplasm with projections.
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