Fig. 1

Kidney pathology of Case 2. A Kidney pathology showed a massive interstitial infiltration of lymphocytes (hematoxylin and eosin). B-E Immunohistochemical stains were positive for (B) CD20, (C) BCL-6, (D) Mum-1, (E) Ki-67 (> 50%), and negative for (F) CD3, (G) CD10, (H) CD21, (I) CK. (Original maginification × 200)