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H&E staining and immunohistochemical staining. H&E staining of bone marrow biopsy of patient 1 was shown in (A). CD20 staining (B) and H&E staining（C）of bone marrow biopsy of patient 2. H&E staining of lymph biopsy of patient 3 was shown in (D). H&E staining of lung biopsy of patient 4 (E) and 5 (F). Pituitary transcription factor 1 (Pit-1) staining of brain biopsy of patient 6 was shown in (G). H&E staining of bone marrow biopsy of patient 7 (H) and 8 (I).
