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ABCG2, MCM2, and VEGF expression in retinoblastoma tumors. (A and B) ABCG2 was expressed outside of the Wintersteiner rosettes or tumor lobules. (C and D) MCM2 was strongly expressed in the rosettes and lobules, especially in the outer portion of the rosettes. (E and F) VEGF positivity was also observed in the rosettes of lobules, specifically in the inner portion of the rosettes. Original magnification ×20 with A, C, and E. Original magnification ×40 with B, D, and F.
