(a) Tumor cells were positive for CD20 (original magnification ×200); (b) Tumor cells were positive for B-cell lymphoma-6 (original magnification ×200); (c) In situ hybridization for Epstein-Barr virus-encode RNA was positive (original magnification ×200); (d) Tumor cells were positive for Ki-67 (original magnification ×200). Clinicopathological study of sporadic Burkitt lymphoma in children. Huang H, Liu ZL, Zeng H, Zhang SH, Huang CS, Xu HY, Wu Y, Zeng ST, Xiong F, Yang WP - Chinese medical journal (2015). Not Altered. CC.