Burkitt’s lymphomas display high expression of Skp2. Serial sections from Burkitt’s lymphomas were stained for Ki-67 (A and B), Skp2 (C and D), and p27 (E and F). High-power magnification (B, D, and F) demonstrates that almost 100% of the cells are Ki-67-positive, and the vast majority are positive for Skp2. p27 was not expressed in the neoplastic cells, rare and few normal cells were p27-positive.